Q: What are the prime factors of the number 15,916,160?

 A: 2, 5, 13, 1913

Why are those the prime factors of the number 15,916,160?

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 15,916,160

15,916,160
Factor Arrows
27,958,080
Factor Arrows
23,979,040
Factor Arrows
21,989,520
Factor Arrows
2994,760
Factor Arrows
2497,380
Factor Arrows
2248,690
Factor Arrows
2124,345
Factor Arrows
524,869
Factor Arrows
131,913

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, 5, 13, 1913

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 5 x 13 x 1,913 = 15,916,160

This can also be written as 27 x 51 x 131 x 1,9131 = 15,916,160

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


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