Q: What are the prime factors of the number 331,712?

 A: 2, 71, 73

Why are those the prime factors of the number 331,712?

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 331,712

331,712
Factor Arrows
2165,856
Factor Arrows
282,928
Factor Arrows
241,464
Factor Arrows
220,732
Factor Arrows
210,366
Factor Arrows
25,183
Factor Arrows
7173

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, 71, 73

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 71 x 73 = 331,712

This can also be written as 26 x 711 x 731 = 331,712

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


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