Q: What are the prime factors of the number 445,312?

 A: 2, 7, 71

Why are those the prime factors of the number 445,312?

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 445,312

445,312
Factor Arrows
2222,656
Factor Arrows
2111,328
Factor Arrows
255,664
Factor Arrows
227,832
Factor Arrows
213,916
Factor Arrows
26,958
Factor Arrows
23,479
Factor Arrows
7497
Factor Arrows
771

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, 71

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 7 x 7 x 71 = 445,312

This can also be written as 27 x 72 x 711 = 445,312

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


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