Q: What are the prime factors of the number 720,537,468?

 A: 2, 3, 7, 23, 461, 809

Why are those the prime factors of the number 720,537,468?

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 720,537,468

720,537,468
Factor Arrows
2360,268,734
Factor Arrows
2180,134,367
Factor Arrows
360,044,789
Factor Arrows
78,577,827
Factor Arrows
23372,949
Factor Arrows
461809

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, 7, 23, 461, 809

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 7 x 23 x 461 x 809 = 720,537,468

This can also be written as 22 x 31 x 71 x 231 x 4611 x 8091 = 720,537,468

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


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