Q: What are the prime factors of the number 11,628?

 A: 2, 3, 17, 19

Why are those the prime factors of the number 11,628?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 11,628

11,628
Factor Arrows
25,814
Factor Arrows
22,907
Factor Arrows
3969
Factor Arrows
3323
Factor Arrows
1719

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 17, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 17 x 19 = 11,628

This can also be written as 22 x 32 x 171 x 191 = 11,628

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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