Q: What are the prime factors of the number 15,666,816?

 A: 2, 3, 11, 3709

Why are those the prime factors of the number 15,666,816?

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 15,666,816

15,666,816
Factor Arrows
27,833,408
Factor Arrows
23,916,704
Factor Arrows
21,958,352
Factor Arrows
2979,176
Factor Arrows
2489,588
Factor Arrows
2244,794
Factor Arrows
2122,397
Factor Arrows
340,799
Factor Arrows
113,709

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, 11, 3709

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 11 x 3,709 = 15,666,816

This can also be written as 27 x 31 x 111 x 3,7091 = 15,666,816

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


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