Find the GCF of 40a + 16

To find the Greatest Common Factor (GCF) of 40a + 16, we need to factor out the common factors of both terms.

First, let's factor out 8 from both terms:
40a + 16 = 8 * 5a + 8 = 8(5a + 2)

The GCF of 40a + 16 is 8.