Q: What are the prime factors of the number 15,307,800?

 A: 2, 3, 5, 31, 823

Why are those the prime factors of the number 15,307,800?

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 15,307,800

15,307,800
Factor Arrows
27,653,900
Factor Arrows
23,826,950
Factor Arrows
21,913,475
Factor Arrows
3637,825
Factor Arrows
5127,565
Factor Arrows
525,513
Factor Arrows
31823

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, 31, 823

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 5 x 31 x 823 = 15,307,800

This can also be written as 23 x 31 x 52 x 311 x 8231 = 15,307,800

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


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