Q: What are the prime factors of the number 747,080,656?

 A: 2, 7, 31, 59, 521

Why are those the prime factors of the number 747,080,656?

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 747,080,656

747,080,656
Factor Arrows
2373,540,328
Factor Arrows
2186,770,164
Factor Arrows
293,385,082
Factor Arrows
246,692,541
Factor Arrows
76,670,363
Factor Arrows
7952,909
Factor Arrows
3130,739
Factor Arrows
59521

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, 7, 31, 59, 521

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 7 x 7 x 31 x 59 x 521 = 747,080,656

This can also be written as 24 x 72 x 311 x 591 x 5211 = 747,080,656

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


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