Q: What are the prime factors of the number 191,744?

 A: 2, 7, 107

Why are those the prime factors of the number 191,744?

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 191,744

191,744
Factor Arrows
295,872
Factor Arrows
247,936
Factor Arrows
223,968
Factor Arrows
211,984
Factor Arrows
25,992
Factor Arrows
22,996
Factor Arrows
21,498
Factor Arrows
2749
Factor Arrows
7107

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, 7, 107

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 7 x 107 = 191,744

This can also be written as 28 x 71 x 1071 = 191,744

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


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