Q: What are the prime factors of the number 31,202,415?

 A: 3, 5, 61, 421

Why are those the prime factors of the number 31,202,415?

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 31,202,415

31,202,415
Factor Arrows
310,400,805
Factor Arrows
33,466,935
Factor Arrows
31,155,645
Factor Arrows
3385,215
Factor Arrows
3128,405
Factor Arrows
525,681
Factor Arrows
61421

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:

3, 5, 61, 421

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 3 x 5 x 61 x 421 = 31,202,415

This can also be written as 35 x 51 x 611 x 4211 = 31,202,415

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


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