Q: What are the prime factors of the number 18,273,668?

 A: 2, 7, 19, 701

Why are those the prime factors of the number 18,273,668?

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 18,273,668

18,273,668
Factor Arrows
29,136,834
Factor Arrows
24,568,417
Factor Arrows
7652,631
Factor Arrows
793,233
Factor Arrows
713,319
Factor Arrows
19701

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, 7, 19, 701

We can check our work by multiplying all of the prime factors together: 2 x 2 x 7 x 7 x 7 x 19 x 701 = 18,273,668

This can also be written as 22 x 73 x 191 x 7011 = 18,273,668

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


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