What is the gcf of 16 and 28?

The greatest common factor (GCF) of 16 and 28 is 4.

To find the GCF, you can list the factors of each number:

Factors of 16: 1, 2, 4, 8, 16 Factors of 28: 1, 2, 4, 7, 14, 28

The largest number that appears in both lists is 4, so the GCF of 16 and 28 is 4.