Q: What are the prime factors of the number 131,310,312?

 A: 2, 3, 7, 17, 23, 1999

Why are those the prime factors of the number 131,310,312?

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 131,310,312

131,310,312
Factor Arrows
265,655,156
Factor Arrows
232,827,578
Factor Arrows
216,413,789
Factor Arrows
35,471,263
Factor Arrows
7781,609
Factor Arrows
1745,977
Factor Arrows
231,999

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, 3, 7, 17, 23, 1999

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 7 x 17 x 23 x 1,999 = 131,310,312

This can also be written as 23 x 31 x 71 x 171 x 231 x 1,9991 = 131,310,312

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


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