Q: What are the prime factors of the number 688,786,520?

 A: 2, 5, 23, 31, 24151

Why are those the prime factors of the number 688,786,520?

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 688,786,520

688,786,520
Factor Arrows
2344,393,260
Factor Arrows
2172,196,630
Factor Arrows
286,098,315
Factor Arrows
517,219,663
Factor Arrows
23748,681
Factor Arrows
3124,151

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, 23, 31, 24151

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 23 x 31 x 24,151 = 688,786,520

This can also be written as 23 x 51 x 231 x 311 x 24,1511 = 688,786,520

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


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