Q: What are the prime factors of the number 63,504?

 A: 2, 3, 7

Why are those the prime factors of the number 63,504?

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 63,504

63,504
Factor Arrows
231,752
Factor Arrows
215,876
Factor Arrows
27,938
Factor Arrows
23,969
Factor Arrows
31,323
Factor Arrows
3441
Factor Arrows
3147
Factor Arrows
349
Factor Arrows
77

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, 7

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 7 x 7 = 63,504

This can also be written as 24 x 34 x 72 = 63,504

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


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