Q: What are the prime factors of the number 861,760?

 A: 2, 5, 2693

Why are those the prime factors of the number 861,760?

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 861,760

861,760
Factor Arrows
2430,880
Factor Arrows
2215,440
Factor Arrows
2107,720
Factor Arrows
253,860
Factor Arrows
226,930
Factor Arrows
213,465
Factor Arrows
52,693

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, 2693

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 5 x 2,693 = 861,760

This can also be written as 26 x 51 x 2,6931 = 861,760

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


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