Q: What are the prime factors of the number 865,180?

 A: 2, 5, 181, 239

Why are those the prime factors of the number 865,180?

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 865,180

865,180
Factor Arrows
2432,590
Factor Arrows
2216,295
Factor Arrows
543,259
Factor Arrows
181239

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, 181, 239

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 181 x 239 = 865,180

This can also be written as 22 x 51 x 1811 x 2391 = 865,180

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


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