Q: What are the prime factors of the number 18,513,670?

 A: 2, 5, 7, 37783

Why are those the prime factors of the number 18,513,670?

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 18,513,670

18,513,670
Factor Arrows
29,256,835
Factor Arrows
51,851,367
Factor Arrows
7264,481
Factor Arrows
737,783

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, 5, 7, 37783

We can check our work by multiplying all of the prime factors together: 2 x 5 x 7 x 7 x 37,783 = 18,513,670

This can also be written as 21 x 51 x 72 x 37,7831 = 18,513,670

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


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