Q: What are the prime factors of the number 810,865?

 A: 5, 11, 23, 641

Why are those the prime factors of the number 810,865?

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 810,865

810,865
Factor Arrows
5162,173
Factor Arrows
1114,743
Factor Arrows
23641

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, 11, 23, 641

We can check our work by multiplying all of the prime factors together: 5 x 11 x 23 x 641 = 810,865

This can also be written as 51 x 111 x 231 x 6411 = 810,865

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


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