Q: What are the prime factors of the number 801,521,406?

 A: 2, 3, 7, 17, 13859

Why are those the prime factors of the number 801,521,406?

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 801,521,406

801,521,406
Factor Arrows
2400,760,703
Factor Arrows
3133,586,901
Factor Arrows
344,528,967
Factor Arrows
314,842,989
Factor Arrows
34,947,663
Factor Arrows
31,649,221
Factor Arrows
7235,603
Factor Arrows
1713,859

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, 17, 13859

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 7 x 17 x 13,859 = 801,521,406

This can also be written as 21 x 35 x 71 x 171 x 13,8591 = 801,521,406

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


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