Q: What are the prime factors of the number 811,780,032?

 A: 2, 3, 7, 23, 26261

Why are those the prime factors of the number 811,780,032?

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 811,780,032

811,780,032
Factor Arrows
2405,890,016
Factor Arrows
2202,945,008
Factor Arrows
2101,472,504
Factor Arrows
250,736,252
Factor Arrows
225,368,126
Factor Arrows
212,684,063
Factor Arrows
34,228,021
Factor Arrows
7604,003
Factor Arrows
2326,261

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, 23, 26261

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 7 x 23 x 26,261 = 811,780,032

This can also be written as 26 x 31 x 71 x 231 x 26,2611 = 811,780,032

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


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