Factors of 15 in pairs

Factors are pairs of numbers which, if multiplied together, give the original number.

The number 15 is a composite number. So, 15 has more than one factor pair.

These are all the factor pairs of 15:

• 1,15
• 3,5

Here is how to find the factor pairs for the number 15:

• 15 divided by 1 is 15. So, (1, 15) is a factor pair of 15
• 15 divided by 3 is 5. So, (3, 5) is a factor pair of 15

Factor pairs of 15 that ads up to a number:

• The factors of 15 that adds up to 16 are 1 and 15
• The factors of 15 that adds up to 18 are 3 and 5

Note 1: if we change the order of all pairs above, we can double the number of pairs. We choose not to show them.
Note 2: do not confuse these pairs with prime factors. See below some info:

The factorization or decomposition of 15 is 3•5.

The prime factors of 15 are 3 and 5. It is the list of the integer's prime factors.