Q: What are the prime factors of the number 813,843,264?

 A: 2, 3, 13, 19, 131

Why are those the prime factors of the number 813,843,264?

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 813,843,264

813,843,264
Factor Arrows
2406,921,632
Factor Arrows
2203,460,816
Factor Arrows
2101,730,408
Factor Arrows
250,865,204
Factor Arrows
225,432,602
Factor Arrows
212,716,301
Factor Arrows
34,238,767
Factor Arrows
13326,059
Factor Arrows
1917,161
Factor Arrows
131131

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, 13, 19, 131

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 13 x 19 x 131 x 131 = 813,843,264

This can also be written as 26 x 31 x 131 x 191 x 1312 = 813,843,264

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


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