Q: What are the prime factors of the number 18,537,012?

 A: 2, 3, 13, 163

Why are those the prime factors of the number 18,537,012?

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 18,537,012

18,537,012
Factor Arrows
29,268,506
Factor Arrows
24,634,253
Factor Arrows
31,544,751
Factor Arrows
3514,917
Factor Arrows
3171,639
Factor Arrows
357,213
Factor Arrows
319,071
Factor Arrows
36,357
Factor Arrows
32,119
Factor Arrows
13163

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, 13, 163

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 13 x 163 = 18,537,012

This can also be written as 22 x 37 x 131 x 1631 = 18,537,012

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


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