What can go into 325 and 1000?

The factors of 325 are:

1, 5, 13, 25, 65, 325

The factors of 1000 are:

1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000

The common factors are:

1, 5, 25