Q: What are the prime factors of the number 818,521,444?

 A: 2, 13, 19, 673, 1231

Why are those the prime factors of the number 818,521,444?

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 818,521,444

818,521,444
Factor Arrows
2409,260,722
Factor Arrows
2204,630,361
Factor Arrows
1315,740,797
Factor Arrows
19828,463
Factor Arrows
6731,231

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, 13, 19, 673, 1231

We can check our work by multiplying all of the prime factors together: 2 x 2 x 13 x 19 x 673 x 1,231 = 818,521,444

This can also be written as 22 x 131 x 191 x 6731 x 1,2311 = 818,521,444

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


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