Q: What are the prime factors of the number 760,857,440?

 A: 2, 5, 7, 17, 89, 449

Why are those the prime factors of the number 760,857,440?

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 760,857,440

760,857,440
Factor Arrows
2380,428,720
Factor Arrows
2190,214,360
Factor Arrows
295,107,180
Factor Arrows
247,553,590
Factor Arrows
223,776,795
Factor Arrows
54,755,359
Factor Arrows
7679,337
Factor Arrows
1739,961
Factor Arrows
89449

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, 17, 89, 449

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 7 x 17 x 89 x 449 = 760,857,440

This can also be written as 25 x 51 x 71 x 171 x 891 x 4491 = 760,857,440

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


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