Q: What are the prime factors of the number 847,280?

 A: 2, 5, 7, 17, 89

Why are those the prime factors of the number 847,280?

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 847,280

847,280
Factor Arrows
2423,640
Factor Arrows
2211,820
Factor Arrows
2105,910
Factor Arrows
252,955
Factor Arrows
510,591
Factor Arrows
71,513
Factor Arrows
1789

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, 5, 7, 17, 89

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 7 x 17 x 89 = 847,280

This can also be written as 24 x 51 x 71 x 171 x 891 = 847,280

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


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