Q: What are the prime factors of the number 845,312?

 A: 2, 13, 127

Why are those the prime factors of the number 845,312?

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 845,312

845,312
Factor Arrows
2422,656
Factor Arrows
2211,328
Factor Arrows
2105,664
Factor Arrows
252,832
Factor Arrows
226,416
Factor Arrows
213,208
Factor Arrows
26,604
Factor Arrows
23,302
Factor Arrows
21,651
Factor Arrows
13127

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, 13, 127

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 2 x 2 x 13 x 127 = 845,312

This can also be written as 29 x 131 x 1271 = 845,312

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


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