Q: What are the prime factors of the number 636,512?

 A: 2, 19891

Why are those the prime factors of the number 636,512?

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 636,512

636,512
Factor Arrows
2318,256
Factor Arrows
2159,128
Factor Arrows
279,564
Factor Arrows
239,782
Factor Arrows
219,891

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, 19891

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 19,891 = 636,512

This can also be written as 25 x 19,8911 = 636,512

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


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