Q: What are the prime factors of the number 811,800?

 A: 2, 3, 5, 11, 41

Why are those the prime factors of the number 811,800?

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 811,800

811,800
Factor Arrows
2405,900
Factor Arrows
2202,950
Factor Arrows
2101,475
Factor Arrows
333,825
Factor Arrows
311,275
Factor Arrows
52,255
Factor Arrows
5451
Factor Arrows
1141

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, 5, 11, 41

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 5 x 11 x 41 = 811,800

This can also be written as 23 x 32 x 52 x 111 x 411 = 811,800

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


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