Q: What are the prime factors of the number 513,671,312?

 A: 2, 7, 11, 67, 127

Why are those the prime factors of the number 513,671,312?

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 513,671,312

513,671,312
Factor Arrows
2256,835,656
Factor Arrows
2128,417,828
Factor Arrows
264,208,914
Factor Arrows
232,104,457
Factor Arrows
74,586,351
Factor Arrows
7655,193
Factor Arrows
793,599
Factor Arrows
118,509
Factor Arrows
67127

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, 11, 67, 127

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 7 x 7 x 7 x 11 x 67 x 127 = 513,671,312

This can also be written as 24 x 73 x 111 x 671 x 1271 = 513,671,312

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


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