Q: What are the prime factors of the number 15,002,624?

 A: 2, 7, 13, 23

Why are those the prime factors of the number 15,002,624?

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 15,002,624

15,002,624
Factor Arrows
27,501,312
Factor Arrows
23,750,656
Factor Arrows
21,875,328
Factor Arrows
2937,664
Factor Arrows
2468,832
Factor Arrows
2234,416
Factor Arrows
2117,208
Factor Arrows
258,604
Factor Arrows
229,302
Factor Arrows
214,651
Factor Arrows
72,093
Factor Arrows
7299
Factor Arrows
1323

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, 7, 13, 23

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 7 x 7 x 13 x 23 = 15,002,624

This can also be written as 210 x 72 x 131 x 231 = 15,002,624

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


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