Q: What are the prime factors of the number 340,587?

 A: 3, 13, 41, 71

Why are those the prime factors of the number 340,587?

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 340,587

340,587
Factor Arrows
3113,529
Factor Arrows
337,843
Factor Arrows
132,911
Factor Arrows
4171

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:

3, 13, 41, 71

We can check our work by multiplying all of the prime factors together: 3 x 3 x 13 x 41 x 71 = 340,587

This can also be written as 32 x 131 x 411 x 711 = 340,587

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


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