Q: What are the prime factors of the number 125,137,664?

 A: 2, 23, 53, 401

Why are those the prime factors of the number 125,137,664?

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 125,137,664

125,137,664
Factor Arrows
262,568,832
Factor Arrows
231,284,416
Factor Arrows
215,642,208
Factor Arrows
27,821,104
Factor Arrows
23,910,552
Factor Arrows
21,955,276
Factor Arrows
2977,638
Factor Arrows
2488,819
Factor Arrows
2321,253
Factor Arrows
53401

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, 23, 53, 401

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 23 x 53 x 401 = 125,137,664

This can also be written as 28 x 231 x 531 x 4011 = 125,137,664

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


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