Q: What are the prime factors of the number 811,706,672?

 A: 2, 7, 79, 199, 461

Why are those the prime factors of the number 811,706,672?

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 811,706,672

811,706,672
Factor Arrows
2405,853,336
Factor Arrows
2202,926,668
Factor Arrows
2101,463,334
Factor Arrows
250,731,667
Factor Arrows
77,247,381
Factor Arrows
7991,739
Factor Arrows
199461

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, 79, 199, 461

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 7 x 79 x 199 x 461 = 811,706,672

This can also be written as 24 x 71 x 791 x 1991 x 4611 = 811,706,672

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


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