Q: What are the prime factors of the number 131,251,260?

 A: 2, 3, 5, 7, 47, 61, 109

Why are those the prime factors of the number 131,251,260?

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 131,251,260

131,251,260
Factor Arrows
265,625,630
Factor Arrows
232,812,815
Factor Arrows
310,937,605
Factor Arrows
52,187,521
Factor Arrows
7312,503
Factor Arrows
476,649
Factor Arrows
61109

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, 5, 7, 47, 61, 109

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 7 x 47 x 61 x 109 = 131,251,260

This can also be written as 22 x 31 x 51 x 71 x 471 x 611 x 1091 = 131,251,260

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


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