Q: What are the prime factors of the number 15,384,690?

 A: 2, 3, 5, 199, 859

Why are those the prime factors of the number 15,384,690?

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 15,384,690

15,384,690
Factor Arrows
27,692,345
Factor Arrows
32,564,115
Factor Arrows
3854,705
Factor Arrows
5170,941
Factor Arrows
199859

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, 199, 859

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 199 x 859 = 15,384,690

This can also be written as 21 x 32 x 51 x 1991 x 8591 = 15,384,690

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


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