Greatest Common Factor (GCF)

 

 

To find the greatest common factor (GCF), list the factors of each number.

 

Example: Find the GCF of 48 and 64:

 

Factors of 48

 

1,48

2,24

3,16

4,12

6,8

 

Factors of 64

 

1,64

2,32

4,16

8,8

 

The common factors are 1, 2, 4, 8, and 16.

The Greatest Common Factor (GCF) of 48 and 64 is 16.