Q: What are the prime factors of the number 84,040?

 A: 2, 5, 11, 191

Why are those the prime factors of the number 84,040?

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 84,040

84,040
Factor Arrows
242,020
Factor Arrows
221,010
Factor Arrows
210,505
Factor Arrows
52,101
Factor Arrows
11191

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, 5, 11, 191

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 11 x 191 = 84,040

This can also be written as 23 x 51 x 111 x 1911 = 84,040

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


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