Q: What are the prime factors of the number 13,901,728?

 A: 2, 43, 10103

Why are those the prime factors of the number 13,901,728?

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 13,901,728

13,901,728
Factor Arrows
26,950,864
Factor Arrows
23,475,432
Factor Arrows
21,737,716
Factor Arrows
2868,858
Factor Arrows
2434,429
Factor Arrows
4310,103

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, 43, 10103

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 43 x 10,103 = 13,901,728

This can also be written as 25 x 431 x 10,1031 = 13,901,728

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


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