Q: What are the prime factors of the number 870,272?

 A: 2, 13, 523

Why are those the prime factors of the number 870,272?

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 870,272

870,272
Factor Arrows
2435,136
Factor Arrows
2217,568
Factor Arrows
2108,784
Factor Arrows
254,392
Factor Arrows
227,196
Factor Arrows
213,598
Factor Arrows
26,799
Factor Arrows
13523

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, 523

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 13 x 523 = 870,272

This can also be written as 27 x 131 x 5231 = 870,272

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


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