**The factors of 180 are one, two, three, four, five, six, nine, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90 and 180.** Any number that can divide into another number without leaving a remainder or having a decimal is considered a factor of the original number.

Division is necessary to evaluate the factors of a number. The number should be divided by all numbers below it in the number line, beginning with one and then increasing by one in value until the original number is reached.

These important factoring shortcuts should be noted:

- If the number ends in zero, then the number has factors of two, five and 10.
- If the number ends in five, it has a factor of five.
- If the number is even, then two is a factor.
- If the number ends in two zeros, then 100 is a factor.