The factors of a number are the whole numbers that can divide the given number without leaving a remainder. To find the factors of 15, we need to determine which whole numbers divide 15 evenly.

The factors of 15 are:

1, 3, 5, 15

These numbers can be multiplied together to give the original number 15:

1 * 15 = 15

3 * 5 = 15

Therefore, the factors of 15 are 1, 3, 5, and 15.

## How many Factors of 15

To find the number of factors of 15, we can list all the factors and count them. The factors of 15 are 1, 3, 5, and 15. Therefore, there are 4 factors of 15.

#### Factor Pairs of 15

To find the factor pairs of 15, we need to determine the pairs of numbers that multiply together to give 15.

The factor pairs of 15 are:

1 * 15 = 15

3 * 5 = 15

Therefore, the factor pairs of 15 are (1, 15) and (3, 5).

#### All Factors of 15 using Multiplication

To find all the factors of 15 using multiplication, we can start by listing the numbers from 1 to 15 and check which ones divide 15 evenly.

1 * 15 = 15

3 * 5 = 15

Therefore, all the factors of 15 are obtained by multiplying 15 with the following numbers: 1, 3, 5, and 15.