Q: What are the prime factors of the number 805,518?

 A: 2, 3, 7, 2131

Why are those the prime factors of the number 805,518?

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 805,518

805,518
Factor Arrows
2402,759
Factor Arrows
3134,253
Factor Arrows
344,751
Factor Arrows
314,917
Factor Arrows
72,131

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, 7, 2131

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 7 x 2,131 = 805,518

This can also be written as 21 x 33 x 71 x 2,1311 = 805,518

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


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