There are many factors for 72. A factor is a number that can be multiplied by another number to create a greater number. A prime factor is when a number cannot be multiplied by other numbers other than itself and 1.
Factors of 72 include:
1, 2, 3, 4, 6, 8, 9, 12, 18, and 36
The prime factors are 1, 2 and 3