What is the greatest common factor between 8 and 21?

Answer 1

The total number of integers that are multiples of both 8 and 21 is infinite. The first few are these: 168, 336, 504, 672, 840 . . .

Answer 2

The prime factorization of 8 is 2 x 2 x 2, but it has only one distinct prime factor.

The prime factorization of 21 is 3 x 7, which is two distinct factors.

Answer 3

The greatest common factor of 8 and 21 is ' 1 '.

Answer 4

The GCF is 1.