Q: What are the prime factors of the number 12,215,798?

 A: 2, 7, 31, 4021

Why are those the prime factors of the number 12,215,798?

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 12,215,798

12,215,798
Factor Arrows
26,107,899
Factor Arrows
7872,557
Factor Arrows
7124,651
Factor Arrows
314,021

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, 31, 4021

We can check our work by multiplying all of the prime factors together: 2 x 7 x 7 x 31 x 4,021 = 12,215,798

This can also be written as 21 x 72 x 311 x 4,0211 = 12,215,798

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


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