Q: What are the prime factors of the number 131,313,312?

 A: 2, 3, 13, 433

Why are those the prime factors of the number 131,313,312?

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 131,313,312

131,313,312
Factor Arrows
265,656,656
Factor Arrows
232,828,328
Factor Arrows
216,414,164
Factor Arrows
28,207,082
Factor Arrows
24,103,541
Factor Arrows
31,367,847
Factor Arrows
3455,949
Factor Arrows
3151,983
Factor Arrows
350,661
Factor Arrows
316,887
Factor Arrows
35,629
Factor Arrows
13433

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, 13, 433

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 3 x 13 x 433 = 131,313,312

This can also be written as 25 x 36 x 131 x 4331 = 131,313,312

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


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