###### Asked in Factoring and Multiples

# What are the common factors and greatest common factor of 121?

## Answer

###### Wiki User

###### 04/02/2011

Short answer: There are none.

There is neither a greatest common factor nor common factors of a single number, such as ??, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor.

Examples:

The common factors of 44 and 121 are 1 and 11; the greatest common factor is 11.

The common factors of 69 and 121 are only 1; the greatest common factor is 1.

The common factors of 121 and 363 are 1, 11, and 121; the greatest common factor is 121.