# Common Factor Calculator

Common Factor Calculator a free online tool that calculates the common factors of two numbers within a few seconds.

## What Is Common Factors Calculator?

To evaluate the common factors of two numbers, we individually calculate all the factors of the two numbers and then mark the common factors.

Cuemath's common factors calculator is a free online tool that calculates the common factors of two numbers within a few seconds.

## How to Use the Common Factors Calculator?

Follow the steps mentioned below to find the common factor of two numbers.

**Step 1**- Enter any two numbers in the respective input boxes.**Step 2**- Click on "**Calculate**" to find the factors of the two input numbers as well as the common factors.**Step 3**- Click on "**Reset**" to clear the fields and enter the new numbers.

## How to Calculate Common Factors?

To evaluate the common factors of the two numbers, first write all the factors of the two numbers.

Then select the numbers that are common in the factors of the two numbers.

Those common numbers are the common factors of the two numbers.

**Solved Example :**

Find the common factors of the numbers 16 and 40.

**Solution :**

Factors of 16 are: **1**, **2**, **4**, **8**, 16

Factors of 40 are: **1**, **2**, **4**, 5, **8**, 10, 20, 40

Therefore, the common factors are: 1, 2, 4, and 8.

Now, use our online common factors calculator and find the common factors of the following numbers.

- 10 and 15
- 21 and 39