Q: What are the prime factors of the number 131,544?

 A: 2, 3, 7, 29

Why are those the prime factors of the number 131,544?

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 131,544

131,544
Factor Arrows
265,772
Factor Arrows
232,886
Factor Arrows
216,443
Factor Arrows
35,481
Factor Arrows
31,827
Factor Arrows
3609
Factor Arrows
3203
Factor Arrows
729

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, 29

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 7 x 29 = 131,544

This can also be written as 23 x 34 x 71 x 291 = 131,544

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


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