Q: What are the prime factors of the number 85,718,875?

 A: 5, 11, 31, 2011

Why are those the prime factors of the number 85,718,875?

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 85,718,875

85,718,875
Factor Arrows
517,143,775
Factor Arrows
53,428,755
Factor Arrows
5685,751
Factor Arrows
1162,341
Factor Arrows
312,011

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:

5, 11, 31, 2011

We can check our work by multiplying all of the prime factors together: 5 x 5 x 5 x 11 x 31 x 2,011 = 85,718,875

This can also be written as 53 x 111 x 311 x 2,0111 = 85,718,875

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


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