Q: What are the prime factors of the number 13,870,976?

 A: 2, 7, 113, 137

Why are those the prime factors of the number 13,870,976?

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 13,870,976

13,870,976
Factor Arrows
26,935,488
Factor Arrows
23,467,744
Factor Arrows
21,733,872
Factor Arrows
2866,936
Factor Arrows
2433,468
Factor Arrows
2216,734
Factor Arrows
2108,367
Factor Arrows
715,481
Factor Arrows
113137

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, 113, 137

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 7 x 113 x 137 = 13,870,976

This can also be written as 27 x 71 x 1131 x 1371 = 13,870,976

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


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