Q: What are the prime factors of the number 18,245,199?

 A: 3, 7, 17, 149

Why are those the prime factors of the number 18,245,199?

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 18,245,199

18,245,199
Factor Arrows
36,081,733
Factor Arrows
7868,819
Factor Arrows
7124,117
Factor Arrows
717,731
Factor Arrows
72,533
Factor Arrows
17149

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, 17, 149

We can check our work by multiplying all of the prime factors together: 3 x 7 x 7 x 7 x 7 x 17 x 149 = 18,245,199

This can also be written as 31 x 74 x 171 x 1491 = 18,245,199

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


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