Q: What are the prime factors of the number 18,627,072?

 A: 2, 3, 67, 181

Why are those the prime factors of the number 18,627,072?

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 18,627,072

18,627,072
Factor Arrows
29,313,536
Factor Arrows
24,656,768
Factor Arrows
22,328,384
Factor Arrows
21,164,192
Factor Arrows
2582,096
Factor Arrows
2291,048
Factor Arrows
2145,524
Factor Arrows
272,762
Factor Arrows
236,381
Factor Arrows
312,127
Factor Arrows
67181

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, 67, 181

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 2 x 2 x 3 x 67 x 181 = 18,627,072

This can also be written as 29 x 31 x 671 x 1811 = 18,627,072

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


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