Q: What are the prime factors of the number 688,731,780?

 A: 2, 3, 5, 11, 23, 59, 769

Why are those the prime factors of the number 688,731,780?

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 688,731,780

688,731,780
Factor Arrows
2344,365,890
Factor Arrows
2172,182,945
Factor Arrows
357,394,315
Factor Arrows
511,478,863
Factor Arrows
111,043,533
Factor Arrows
2345,371
Factor Arrows
59769

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, 11, 23, 59, 769

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 11 x 23 x 59 x 769 = 688,731,780

This can also be written as 22 x 31 x 51 x 111 x 231 x 591 x 7691 = 688,731,780

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


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