What are the greatest common factor of 256 and 320?

Answer 1

There is neither a greatest common factor nor common factors of a single number, such as 320, 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.

The factors of 320 are 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, and 320.

Examples:

The common factors of 60 and 320 are 1, 2, 4, 5, 10, and 20; the greatest common factor is 20.

The common factors of 72 and 320 are 1, 2, 4, and 8; the greatest common factor is 8.

Answer 2

256 - 1 ,2, 4, 8, 16, 32, 64, 128, 256

320 - 1, 2, 4, 5, 8, 10, 32, 40, 64, 80, 160, 320

the GCf is 64

Answer 3

20