What is the gcf of 16 and 40?

The greatest common factor (GCF) of 16 and 40 is 8.

To find the GCF, you can list the factors of each number and find the largest factor that is common to both numbers.

Factors of 16: 1, 2, 4, 8, 16 Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40

The largest factor that is common to both 16 and 40 is 8, so the GCF of 16 and 40 is 8.