Q: What are the prime factors of the number 515,712?

 A: 2, 3, 17, 79

Why are those the prime factors of the number 515,712?

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 515,712

515,712
Factor Arrows
2257,856
Factor Arrows
2128,928
Factor Arrows
264,464
Factor Arrows
232,232
Factor Arrows
216,116
Factor Arrows
28,058
Factor Arrows
24,029
Factor Arrows
31,343
Factor Arrows
1779

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, 17, 79

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 3 x 17 x 79 = 515,712

This can also be written as 27 x 31 x 171 x 791 = 515,712

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


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