Q: What are the prime factors of the number 104,320?

 A: 2, 5, 163

Why are those the prime factors of the number 104,320?

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 104,320

104,320
Factor Arrows
252,160
Factor Arrows
226,080
Factor Arrows
213,040
Factor Arrows
26,520
Factor Arrows
23,260
Factor Arrows
21,630
Factor Arrows
2815
Factor Arrows
5163

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, 163

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 x 163 = 104,320

This can also be written as 27 x 51 x 1631 = 104,320

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


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