Factors of 1000
The distinct factors of 1000 are the numbers which when dividing 1000 leaves the remainder zero. The number 1000 has several factors and also is an even composite number. In this lesson, we will calculate the factors of 1000, prime factors of 1000, and factors of 1000 in pairs along with solved examples for a better understanding.
Factors of 1000: 1 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500,and 1000.
Prime Factorization of 1000: 1000 = 2 × 2 × 2 × 5 × 5 × 5.
1.  What Are the Factors of 1000? 
2.  Important Notes 
3.  How to Calculate Factors of 1000? 
4.  Factors of 37 by Prime Factorization 
5.  Factors of 1000 in Pairs 
6.  FAQs on Factors of 1000 
What Are the Factors of 1000?
The factor of a number is that number that divides it completely i.e., it leaves no remainder. To find the factors of the number 1000, we will have to perform division on 1000 and find the numbers which divide 1000 completely, leaving no remainders.
How to Calculate the Factors of 1000?
To calculate the factors of any number, say 1000, we need to find all the numbers that would divide 1000 without leaving any remainder. We can start with the number 1, then check for numbers 2, 3, 4, 5, 6, 7, etc. up to 500 (approximate half of 1000). The number 1 and the number itself will always be a factor of the given number.
The following table shows division of 1000 by its factors:
Division  Factor 

1000 ÷ 1 
Remainder = 0, Factor = 1 
1000 ÷ 2 
Remainder = 0, Factor = 2 
1000 ÷ 4 
Remainder = 0, Factor = 4 
1000 ÷ 5 
Remainder = 0, Factor = 5 
1000 ÷ 8 
Remainder = 0, Factor = 8 
1000 ÷ 10 
Remainder = 0, Factor = 10 
1000 ÷ 20 
Remainder = 0, Factor = 20 
1000 ÷ 25 
Remainder = 0, Factor = 25 
1000 ÷ 40 
Remainder = 0, Factor = 40 
1000 ÷ 50 
Remainder = 0, Factor = 50 
1000 ÷ 100 
Remainder = 0, Factor = 100 
1000 ÷ 125 
Remainder = 0, Factor = 125 
1000 ÷ 200 
Remainder = 0, Factor = 200 
1000 ÷ 250 
Remainder = 0, Factor = 250 
1000 ÷ 500 
Remainder = 0, Factor = 500 
1000 ÷ 1000 
Remainder = 0, Factor = 1000 
Hence, the factors of 1000 are 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, and 1000.
Explore factors using illustrations and interactive examples
 Factors of 100  The factors of 100 are 1, 2, 4, 8, 10, 20, 25, 50, and 100
 Factors of 110  The factors of 110 are 1, 2, 5, 11, 22, 55, and 110
 Factors of 200  The factors of 200 are 1, 2, 4, 8, 10, 20, 25, 50, 100 and 200
 Factors of 400  The factors of 400 are 1, 2, 4, 8, 10, 20, 25, 50, 100, 200, and 400
 Factors of 900  The factors of 900 are 1, 2, 3, 4, 5, 6, 10, 15, 20, 25, 30, 50, 75, 100, 300, 450, and 900
Important Notes
 Only whole numbers and integers can be converted to factors.
 Only composite numbers can have more than two factors.
 The smallest factor of a number is 1 and the biggest factor of a number would be the number itself.
Factors of 1000 by Prime Factorization
Prime Factorization of 1000 refers to breaking down a number into the form of products of its prime factors. There are different methods that can be used to find the prime factorization of a number and its prime factors.
Method 1  Division Method
To find the prime factors of 1000 using the division method,
 Start dividing 1000 from the smallest prime number i.e., 2, 3, 5, and so on, and find the smallest prime factor of the number.
 After finding the smallest prime factor of the number 1000, which is 2, divide 1000 by 2 to obtain the quotient 500. Hence 500 and 2 are the factors of 1000.
 Repeat step 1 with the obtained quotient (500) and continue until you reach quotient as 1.
So, the Prime factorization of 1000 is 2 × 2 × 2 × 5 × 5 × 5.
Method 2  Factor Tree Method
We can do the same procedure used above, the factor tree as shown in the diagram given below:
Further, find the products of the multiplicands in different orders to obtain the composite factors of the number. Thus, the total factors of 1000 including both the prime and composite numbers together can be written as, 1, 2, 4, 8, 10, 20, 25, 50, 100, 125, 200, 250, 500, 1000.
Factors of 1000 in Pairs
Pair factors are the pair of factors of a number that give the original number when multiplied together. The pair factors of 1000 would be the two numbers when multiplied together, result in the value 1000.
The following table represents the calculation of pair factors of 1000:
Pair Factorization  Factor Pair 

1 × 1000 = 1000  (1, 1000) 
2 × 500 = 1000  (2, 500) 
4 × 250 = 1000  (4, 250) 
5 × 200 = 1000  (5, 200) 
8 × 125 = 1000  (8, 125) 
10× 100 = 1000  (10, 100) 
20 × 50 = 1000  (20, 50) 
25 × 40 = 1000  (25, 40) 
Negative pair factors of 1000
The product of two negative numbers gives a positive number, the product of the negative values of both the numbers in a pair factor will also give 104
The negative factor pairs of 104 would be ( 1, 1000 ), ( 2, 500), ( 4, 250), ( 5, 200), ( 8, 125), ( 10, 100), ( 20, 50) and ( 25, 40).
Solved Examples on factors of 1000

Example 1: Can you help Minnie calculate the sum of all the factors of 1000 that are also divisible by 10?
Solution
We know, the factors of 1000 also divisible by 10 are 10, 20, 40, 50, 100, 200, 250, 500, and 1000.
Thus, the sum of all the factors of 1000 that are also divisible by 10 = 10 + 20 + 40 + 50 + 100 + 200 + 250 + 500 + 1000 = 2,170 
Example 2: What are the total positive pairs of factors of 1000?
Solution
We know, factors of 1000 = 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500,1000
The factor pairs = (1, 1000), (2, 500), (4, 250), (5, 200), (8, 125), (10, 100), (20, 50), (25, 40)Hence, total factor pairs of 1000 = 8
FAQs on factors of 1000
1. What are the factors of 1000?
The factors of 1000 are 1 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500,and 1000.
2. Is 1000 a perfect square?
We know, 1000 = 2 × 2 × 2 × 5 × 5 × 5. Using prime factorization, we see that the square root of 1000 cannot be calculated.
Thus, 1000 is not a perfect square.
3. What number is a multiple and factor of 1000?
We know, Factors of 1000 = 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500,1000
Multiples of 1000 = 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, and so on.
So, the only number that is both the factor and multiple of 1000 is 1000 itself.
4. What is the prime factorization of 1000?
Prime Factorization of a number refers to breaking down a number into the form of products of its prime factors.
So, the Prime factorization of 1000 is 2^{3} × 5^{3}.