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21, 15, 18, 56 Common Factors Calculator

Created By : Prasanna
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023


A whole number which is a factor of two or more numbers is referred to as a common factor. To find the Common Factors of 21, 15, 18, 56 we can either Common Factors Calculator or follow the below provided steps.

Ex: 10, 15, 20 (or) 24, 48, 96,45 (or) 78902, 89765, 12345

Common Factors of

Common Factors of 21,15,18,56

Given numbers are 21,15,18,56

To find the common factors of 21,15,18,56 we have to find the factors of every number and list the common in them.

Factors of 21

The factors of 21 are :

1,3,7,21

Factors of 15

The factors of 15 are :

1,3,5,15

Factors of 18

The factors of 18 are :

1,2,3,6,9,18

Factors of 56

The factors of 56 are :

1,2,4,7,8,14,28,56


Common Factors of 21,15,18,56 are 1

The Greatest Common Factor of 21,15,18,56 is 1.

Common Factors of Numbers Calculation Examples

FAQs on Common Factors

1. What are the common factors of 21, 15, 18, 56?

The common factors of 21, 15, 18, 56 are 1.