Three.
One
648 324,2 162,2,2 81,2,2,2 27,3,2,2,2 9,3,3,2,2,2 3,3,3,3,2,2,2
What are the factor strings of 120
At least thirty-six of them.
3 is the answer..
Factor strings are multiplication sentences. 3 x 3 is a factor string for 9.
41 is prime. No strings.
23 is prime. No strings.
81 is the only such factor.
one
The least common factor of any set of integers is 1.