Q: What are the prime factors of the number 635,140,520?

 A: 2, 5, 7, 37, 101, 607

Why are those the prime factors of the number 635,140,520?

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 635,140,520

635,140,520
Factor Arrows
2317,570,260
Factor Arrows
2158,785,130
Factor Arrows
279,392,565
Factor Arrows
515,878,513
Factor Arrows
72,268,359
Factor Arrows
3761,307
Factor Arrows
101607

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, 5, 7, 37, 101, 607

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 7 x 37 x 101 x 607 = 635,140,520

This can also be written as 23 x 51 x 71 x 371 x 1011 x 6071 = 635,140,520

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


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