Q: What are the prime factors of the number 635,520?

 A: 2, 3, 5, 331

Why are those the prime factors of the number 635,520?

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 635,520

635,520
Factor Arrows
2317,760
Factor Arrows
2158,880
Factor Arrows
279,440
Factor Arrows
239,720
Factor Arrows
219,860
Factor Arrows
29,930
Factor Arrows
24,965
Factor Arrows
31,655
Factor Arrows
5331

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, 5, 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 3 x 5 x 331 = 635,520

This can also be written as 27 x 31 x 51 x 3311 = 635,520

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


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