Factors of 399 in pairs

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

The number 399 is a composite number. So, 399 has more than one factor pair.

These are all the factor pairs of 399:

• 1,399
• 3,133
• 7,57
• 19,21

Here is how to find the factor pairs for the number 399:

• 399 divided by 1 is 399. So, (1, 399) is a factor pair of 399
• 399 divided by 3 is 133. So, (3, 133) is a factor pair of 399
• 399 divided by 7 is 57. So, (7, 57) is a factor pair of 399
• 399 divided by 19 is 21. So, (19, 21) is a factor pair of 399

Factor pairs of 399 that ads up to a number:

• The factors of 399 that adds up to 400 are 1 and 399
• The factors of 399 that adds up to 402 are 3 and 133
• The factors of 399 that adds up to 406 are 7 and 57
• The factors of 399 that adds up to 418 are 19 and 21

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 399 is 3•7•19.

The prime factors of 399 are 3, 7 and 19. It is the list of the integer's prime factors.