Q: What are the prime factors of the number 845,784?

 A: 2, 3, 17, 691

Why are those the prime factors of the number 845,784?

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 845,784

845,784
Factor Arrows
2422,892
Factor Arrows
2211,446
Factor Arrows
2105,723
Factor Arrows
335,241
Factor Arrows
311,747
Factor Arrows
17691

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, 17, 691

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 17 x 691 = 845,784

This can also be written as 23 x 32 x 171 x 6911 = 845,784

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


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