Factors of 20 in pairs

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

The number 20 is a composite number. So, 20 has more than one factor pair.

These are all the factor pairs of 20:

• 1,20
• 2,10
• 4,5

Here is how to find the factor pairs for the number 20:

• 20 divided by 1 is 20. So, (1, 20) is a factor pair of 20
• 20 divided by 2 is 10. So, (2, 10) is a factor pair of 20
• 20 divided by 4 is 5. So, (4, 5) is a factor pair of 20

Factor pairs of 20 that ads up to a number:

• The factors of 20 that adds up to 21 are 1 and 20
• The factors of 20 that adds up to 22 are 2 and 10
• The factors of 20 that adds up to 24 are 4 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 20 is 2²•5.

The prime factors of 20 are 2 and 5. It is the list of the integer's prime factors.