A factor is a group of 2 or more numbers that can be multiplied to make a greater number.
The factors for 400 include:
1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200
When paired together:
(1, 400), (2, 200), (4, 100), (5, 80), (8, 50), (10,40), (16, 25), (20,20)
Prime factors:
1, 2, 5
