Q: What are the prime factors of the number 212,321,312?

 A: 2, 7, 135409

Why are those the prime factors of the number 212,321,312?

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 212,321,312

212,321,312
Factor Arrows
2106,160,656
Factor Arrows
253,080,328
Factor Arrows
226,540,164
Factor Arrows
213,270,082
Factor Arrows
26,635,041
Factor Arrows
7947,863
Factor Arrows
7135,409

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, 135409

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 7 x 135,409 = 212,321,312

This can also be written as 25 x 72 x 135,4091 = 212,321,312

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


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