Q: What are the prime factors of the number 15,972,384?

 A: 2, 3, 17, 9787

Why are those the prime factors of the number 15,972,384?

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 15,972,384

15,972,384
Factor Arrows
27,986,192
Factor Arrows
23,993,096
Factor Arrows
21,996,548
Factor Arrows
2998,274
Factor Arrows
2499,137
Factor Arrows
3166,379
Factor Arrows
179,787

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, 17, 9787

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 17 x 9,787 = 15,972,384

This can also be written as 25 x 31 x 171 x 9,7871 = 15,972,384

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


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