Question

Find the common factor,
8, 32, 72 $\Rightarrow$

Answer 1

Consider prime factors

$8=1\times 2\times 2\times 232=1\times 2\times 2\times 2\times 2\times 272=1\times 2\times 2\times 2\times 3\times 3$

so thee common factors are $1,2,4,8$