Q: What are the prime factors of the number 15,250,368?

 A: 2, 3, 7, 1621

Why are those the prime factors of the number 15,250,368?

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 15,250,368

15,250,368
Factor Arrows
27,625,184
Factor Arrows
23,812,592
Factor Arrows
21,906,296
Factor Arrows
2953,148
Factor Arrows
2476,574
Factor Arrows
2238,287
Factor Arrows
379,429
Factor Arrows
711,347
Factor Arrows
71,621

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, 7, 1621

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 7 x 7 x 1,621 = 15,250,368

This can also be written as 26 x 31 x 72 x 1,6211 = 15,250,368

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


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