Q: What are the prime factors of the number 861,792?

 A: 2, 3, 47, 191

Why are those the prime factors of the number 861,792?

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 861,792

861,792
Factor Arrows
2430,896
Factor Arrows
2215,448
Factor Arrows
2107,724
Factor Arrows
253,862
Factor Arrows
226,931
Factor Arrows
38,977
Factor Arrows
47191

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, 47, 191

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 47 x 191 = 861,792

This can also be written as 25 x 31 x 471 x 1911 = 861,792

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


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