Q: What are the prime factors of the number 635,664?

 A: 2, 3, 17, 19, 41

Why are those the prime factors of the number 635,664?

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 635,664

635,664
Factor Arrows
2317,832
Factor Arrows
2158,916
Factor Arrows
279,458
Factor Arrows
239,729
Factor Arrows
313,243
Factor Arrows
17779
Factor Arrows
1941

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, 17, 19, 41

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 17 x 19 x 41 = 635,664

This can also be written as 24 x 31 x 171 x 191 x 411 = 635,664

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


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