**The factor pairs of 72 are 1 x 72, 2 x 36, 3 x 24, 4 x 18, 6 x 12 and 8 x 9.** The product of each of these number pairs is 72.

Seventy-two is a composite number, which means it has other factors aside from 1 and itself. Its factors can be determined by finding the numbers it is divisible to. The factors of 72 can be listed as 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72. Its prime factors are 2 x 2 x 2 x 3 x 3. The numbers 2 and 3 are prime numbers and the product of three 2’s and two 3’s is 72.