Q: What are the prime factors of the number 12,625,664?

 A: 2, 149, 331

Why are those the prime factors of the number 12,625,664?

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 12,625,664

12,625,664
Factor Arrows
26,312,832
Factor Arrows
23,156,416
Factor Arrows
21,578,208
Factor Arrows
2789,104
Factor Arrows
2394,552
Factor Arrows
2197,276
Factor Arrows
298,638
Factor Arrows
249,319
Factor Arrows
149331

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, 149, 331

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 149 x 331 = 12,625,664

This can also be written as 28 x 1491 x 3311 = 12,625,664

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


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