Q: What are the prime factors of the number 126,353,664?

 A: 2, 3, 173, 317

Why are those the prime factors of the number 126,353,664?

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 126,353,664

126,353,664
Factor Arrows
263,176,832
Factor Arrows
231,588,416
Factor Arrows
215,794,208
Factor Arrows
27,897,104
Factor Arrows
23,948,552
Factor Arrows
21,974,276
Factor Arrows
2987,138
Factor Arrows
2493,569
Factor Arrows
3164,523
Factor Arrows
354,841
Factor Arrows
173317

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, 173, 317

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 3 x 3 x 173 x 317 = 126,353,664

This can also be written as 28 x 32 x 1731 x 3171 = 126,353,664

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


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