Q: What are the prime factors of the number 651,805?

 A: 5, 7, 11, 1693

Why are those the prime factors of the number 651,805?

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 651,805

651,805
Factor Arrows
5130,361
Factor Arrows
718,623
Factor Arrows
111,693

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:

5, 7, 11, 1693

We can check our work by multiplying all of the prime factors together: 5 x 7 x 11 x 1,693 = 651,805

This can also be written as 51 x 71 x 111 x 1,6931 = 651,805

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


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