Q: What are the prime factors of the number 485,005,664?

 A: 2, 11, 13, 31, 263

Why are those the prime factors of the number 485,005,664?

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 485,005,664

485,005,664
Factor Arrows
2242,502,832
Factor Arrows
2121,251,416
Factor Arrows
260,625,708
Factor Arrows
230,312,854
Factor Arrows
215,156,427
Factor Arrows
111,377,857
Factor Arrows
13105,989
Factor Arrows
138,153
Factor Arrows
31263

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, 11, 13, 31, 263

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 11 x 13 x 13 x 31 x 263 = 485,005,664

This can also be written as 25 x 111 x 132 x 311 x 2631 = 485,005,664

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


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