Q: What are the prime factors of the number 18,393,750?

 A: 2, 3, 5, 109

Why are those the prime factors of the number 18,393,750?

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 18,393,750

18,393,750
Factor Arrows
29,196,875
Factor Arrows
33,065,625
Factor Arrows
31,021,875
Factor Arrows
3340,625
Factor Arrows
568,125
Factor Arrows
513,625
Factor Arrows
52,725
Factor Arrows
5545
Factor Arrows
5109

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, 5, 109

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 5 x 5 x 5 x 5 x 5 x 109 = 18,393,750

This can also be written as 21 x 33 x 55 x 1091 = 18,393,750

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


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