Q: What are the prime factors of the number 31,218,300?

 A: 2, 3, 5, 34687

Why are those the prime factors of the number 31,218,300?

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 31,218,300

31,218,300
Factor Arrows
215,609,150
Factor Arrows
27,804,575
Factor Arrows
32,601,525
Factor Arrows
3867,175
Factor Arrows
5173,435
Factor Arrows
534,687

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, 34687

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 5 x 34,687 = 31,218,300

This can also be written as 22 x 32 x 52 x 34,6871 = 31,218,300

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


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