Q: What are the prime factors of the number 187,488?

 A: 2, 3, 7, 31

Why are those the prime factors of the number 187,488?

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 187,488

187,488
Factor Arrows
293,744
Factor Arrows
246,872
Factor Arrows
223,436
Factor Arrows
211,718
Factor Arrows
25,859
Factor Arrows
31,953
Factor Arrows
3651
Factor Arrows
3217
Factor Arrows
731

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, 31

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 7 x 31 = 187,488

This can also be written as 25 x 33 x 71 x 311 = 187,488

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


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