Factors of 40 in pairs

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

The number 40 is a composite number. So, 40 has more than one factor pair.

These are all the factor pairs of 40:

• 1,40
• 2,20
• 4,10
• 5,8

Here is how to find the factor pairs for the number 40:

• 40 divided by 1 is 40. So, (1, 40) is a factor pair of 40
• 40 divided by 2 is 20. So, (2, 20) is a factor pair of 40
• 40 divided by 4 is 10. So, (4, 10) is a factor pair of 40
• 40 divided by 5 is 8. So, (5, 8) is a factor pair of 40

Factor pairs of 40 that ads up to a number:

• The factors of 40 that adds up to 41 are 1 and 40
• The factors of 40 that adds up to 42 are 2 and 20
• The factors of 40 that adds up to 44 are 4 and 10
• The factors of 40 that adds up to 45 are 5 and 8

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 40 is 2³•5.

The prime factors of 40 are 2 and 5. It is the list of the integer's prime factors.