LCM of 2, 3, 4, 5, 6, and 7
LCM of 2, 3, 4, 5, 6, and 7 is the smallest number among all common multiples of 2, 3, 4, 5, 6, and 7. The first few multiples of 2, 3, 4, 5, 6, and 7 are (2, 4, 6, 8, 10 . . .), (3, 6, 9, 12, 15 . . .), (4, 8, 12, 16, 20 . . .), (5, 10, 15, 20, 25 . . .), (6, 12, 18, 24, 30 . . .), and (7, 14, 21, 28, 35 . . .) respectively. There are 3 commonly used methods to find LCM of 2, 3, 4, 5, 6, and 7  by division method, by prime factorization, and by listing multiples.
1.  LCM of 2, 3, 4, 5, 6, and 7 
2.  List of Methods 
3.  Solved Examples 
4.  FAQs 
What is the LCM of 2, 3, 4, 5, 6, and 7?
Answer: LCM of 2, 3, 4, 5, 6, and 7 is 420.
Explanation:
The LCM of six nonzero integers, a(2), b(3), c(4), d(5), e(6), and f(7), is the smallest positive integer m(420) that is divisible by a(2), b(3), c(4), d(5), e(6), and f(7) without any remainder.
Methods to Find LCM of 2, 3, 4, 5, 6, and 7
Let's look at the different methods for finding the LCM of 2, 3, 4, 5, 6, and 7.
 By Prime Factorization Method
 By Listing Multiples
 By Division Method
LCM of 2, 3, 4, 5, 6, and 7 by Prime Factorization
Prime factorization of 2, 3, 4, 5, 6, and 7 is (2) = 2^{1}, (3) = 3^{1}, (2 × 2) = 2^{2}, (5) = 5^{1}, (2 × 3) = 2^{1} × 3^{1}, and (7) = 7^{1} respectively. LCM of 2, 3, 4, 5, 6, and 7 can be obtained by multiplying prime factors raised to their respective highest power, i.e. 2^{2} × 3^{1} × 5^{1} × 7^{1} = 420.
Hence, the LCM of 2, 3, 4, 5, 6, and 7 by prime factorization is 420.
LCM of 2, 3, 4, 5, 6, and 7 by Listing Multiples
To calculate the LCM of 2, 3, 4, 5, 6, and 7 by listing out the common multiples, we can follow the given below steps:
 Step 1: List a few multiples of 2 (2, 4, 6, 8, 10, . . .420, . . .), 3 (3, 6, 9, 12, 15, . . .420, . . .), 4 (4, 8, 12, 16, 20, . . .420, . . .), 5 (5, 10, 15, 20, 25, . . .420, . . .), 6 (6, 12, 18, 24, 30, . . .420, . . .), and 7 (7, 14, 21, 28, 35, . . .420, . . .).
 Step 2: The common multiples from the multiples of 2, 3, 4, 5, 6, and 7 are 420, 840, . . .
 Step 3: The smallest common multiple of 2, 3, 4, 5, 6, and 7 is 420.
∴ The least common multiple of 2, 3, 4, 5, 6, and 7 = 420.
LCM of 2, 3, 4, 5, 6, and 7 by Division Method
To calculate the LCM of 2, 3, 4, 5, 6, and 7 by the division method, we will divide the numbers(2, 3, 4, 5, 6, 7) by their prime factors (preferably common). The product of these divisors gives the LCM of 2, 3, 4, 5, 6, and 7.
 Step 1: Find the smallest prime number that is a factor of at least one of the numbers, 2, 3, 4, 5, 6, and 7. Write this prime number(2) on the left of the given numbers(2, 3, 4, 5, 6, and 7), separated as per the ladder arrangement.
 Step 2: If any of the given numbers (2, 3, 4, 5, 6, 7) is a multiple of 2, divide it by 2 and write the quotient below it. Bring down any number that is not divisible by the prime number.
 Step 3: Continue the steps until only 1s are left in the last row.
The LCM of 2, 3, 4, 5, 6, and 7 is the product of all prime numbers on the left, i.e. LCM(2, 3, 4, 5, 6, 7) by division method = 2 × 2 × 3 × 5 × 7 = 420.
ā Also Check:
 LCM of 4, 12 and 16  48
 LCM of 6 and 18  18
 LCM of 12 and 60  60
 LCM of 12, 18 and 20  180
 LCM of 5, 6 and 7  210
 LCM of 80 and 120  240
 LCM of 20 and 50  100
LCM of 2, 3, 4, 5, 6, and 7 Examples

Example 1: Which of the following is the LCM of 2, 3, 4, 5, 6, 7? 420, 35, 2, 96.
Solution:
The value of LCM of 2, 3, 4, 5, 6, and 7 is the smallest common multiple of 2, 3, 4, 5, 6, and 7.
The number satisfying the given condition is 420.
∴LCM(2, 3, 4, 5, 6, 7) = 420.

Example 2: Find the smallest number that is divisible by 2, 3, 4, 5, 6, and 7 exactly.
Solution:
The value of LCM(2, 3, 4, 5, 6, 7) will be the smallest number that is exactly divisible by 2, 3, 4, 5, 6, and 7.
⇒ Multiples of 2, 3, 4, 5, 6, and 7: Multiples of 2 = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, . . ., 414, 416, 418, 420, . . . .
 Multiples of 3 = 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, . . ., 414, 417, 420, . . . .
 Multiples of 4 = 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, . . ., 404, 408, 412, 416, 420, . . . .
 Multiples of 5 = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, . . ., 405, 410, 415, 420, . . . .
 Multiples of 6 = 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . ., 408, 414, 420, . . . .
 Multiples of 7 = 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, . . ., 399, 406, 413, 420, . . . .
Therefore, the LCM of 2, 3, 4, 5, 6, and 7 is 420.

Example 3: Find the smallest number which when divided by 2, 3, 4, 5, 6, and 7 leaves 1 as the remainder in each case.
Solution:
The smallest number exactly divisible by 2, 3, 4, 5, 6, and 7 = LCM(2, 3, 4, 5, 6, 7)
⇒ Smallest number which leaves 1 as remainder when divided by 2, 3, 4, 5, 6, and 7 = LCM(2, 3, 4, 5, 6, 7) + 1
 2 = 2^{1}
 3 = 3^{1}
 4 = 2^{2}
 5 = 5^{1}
 6 = 2^{1} × 3^{1}
 7 = 7^{1}
LCM(2, 3, 4, 5, 6, 7) = 2^{2} × 3^{1} × 5^{1} × 7^{1} = 420
⇒ The required number = 420 + 1 = 421.
FAQs on LCM of 2, 3, 4, 5, 6, and 7
What is the LCM of 2, 3, 4, 5, 6, and 7?
The LCM of 2, 3, 4, 5, 6, and 7 is 420. To find the LCM of 2, 3, 4, 5, 6, and 7, we need to find the multiples of 2, 3, 4, 5, 6, and 7 (multiples of 2 = 2, 4, 6, 8, . . . 420, . . .; multiples of 3 = 3, 6, 9, 12,. . . 420, . . .; multiples of 4 = 4, 8, 12, 16, . . .420, . . .; multiples of 5 = 5, 10, 15, 20, . . . 420, . . .; multiples of 6 = 6, 12, 18, 24, . . . 420, . . .; multiples of 7 = 7, 14, 21, 28,. . . 420, . . .) and choose the smallest multiple that is exactly divisible by 2, 3, 4, 5, 6, and 7, i.e., 420.
What is the Least Perfect Square Divisible by 2, 3, 4, 5, 6, and 7?
The least number divisible by 2, 3, 4, 5, 6, and 7 = LCM(2, 3, 4, 5, 6, 7)
LCM of 2, 3, 4, 5, 6, and 7 = 2 × 2 × 3 × 5 × 7 [Incomplete pair(s): 3, 5, 7]
⇒ Least perfect square divisible by each 2, 3, 4, 5, 6, and 7 = LCM(2, 3, 4, 5, 6, 7) × 3 × 5 × 7 = 44100 [Square root of 44100 = √44100 = ±210]
Therefore, 44100 is the required number.
What are the Methods to Find LCM of 2, 3, 4, 5, 6, and 7?
The commonly used methods to find the LCM of 2, 3, 4, 5, 6, and 7 are:
 Division Method
 Prime Factorization Method
 Listing Multiples
Which of the following is the LCM of 2, 3, 4, 5, 6, and 7? 96, 42, 32, 420
The value of LCM of 2, 3, 4, 5, 6, 7 is the smallest common multiple of 2, 3, 4, 5, 6, and 7. The number satisfying the given condition is 420.