Q: What are the prime factors of the number 18,023,808?

 A: 2, 3, 11, 17, 251

Why are those the prime factors of the number 18,023,808?

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 18,023,808

18,023,808
Factor Arrows
29,011,904
Factor Arrows
24,505,952
Factor Arrows
22,252,976
Factor Arrows
21,126,488
Factor Arrows
2563,244
Factor Arrows
2281,622
Factor Arrows
2140,811
Factor Arrows
346,937
Factor Arrows
114,267
Factor Arrows
17251

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, 11, 17, 251

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 2 x 3 x 11 x 17 x 251 = 18,023,808

This can also be written as 27 x 31 x 111 x 171 x 2511 = 18,023,808

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


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