Q: What are the prime factors of the number 819,856?

 A: 2, 51241

Why are those the prime factors of the number 819,856?

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 819,856

819,856
Factor Arrows
2409,928
Factor Arrows
2204,964
Factor Arrows
2102,482
Factor Arrows
251,241

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, 51241

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 51,241 = 819,856

This can also be written as 24 x 51,2411 = 819,856

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


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