Q: What are the prime factors of the number 18,525,171?

 A: 3, 7, 19, 29, 1601

Why are those the prime factors of the number 18,525,171?

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 18,525,171

18,525,171
Factor Arrows
36,175,057
Factor Arrows
7882,151
Factor Arrows
1946,429
Factor Arrows
291,601

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:

3, 7, 19, 29, 1601

We can check our work by multiplying all of the prime factors together: 3 x 7 x 19 x 29 x 1,601 = 18,525,171

This can also be written as 31 x 71 x 191 x 291 x 1,6011 = 18,525,171

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


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