Q: What are the prime factors of the number 15,504?

 A: 2, 3, 17, 19

Why are those the prime factors of the number 15,504?

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 15,504

15,504
Factor Arrows
27,752
Factor Arrows
23,876
Factor Arrows
21,938
Factor Arrows
2969
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 2 x 2 x 3 x 17 x 19 = 15,504

This can also be written as 24 x 31 x 171 x 191 = 15,504

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


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