Q: What are the prime factors of the number 15,885,120?

 A: 2, 3, 5, 16547

Why are those the prime factors of the number 15,885,120?

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 15,885,120

15,885,120
Factor Arrows
27,942,560
Factor Arrows
23,971,280
Factor Arrows
21,985,640
Factor Arrows
2992,820
Factor Arrows
2496,410
Factor Arrows
2248,205
Factor Arrows
382,735
Factor Arrows
516,547

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, 5, 16547

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 3 x 5 x 16,547 = 15,885,120

This can also be written as 26 x 31 x 51 x 16,5471 = 15,885,120

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


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