What numbers go into 27 and 99?

The numbers that go into 27 are its divisors: 1, 3, 9, and 27. For 99, the divisors are 1, 3, 9, 11, 33, and 99. Both 27 and 99 share common divisors, which are 1, 3, and 9. The greatest common divisor (GCD) of 27 and 99 is 9.