Q: What are the prime factors of the number 691,888?

 A: 2, 83, 521

Why are those the prime factors of the number 691,888?

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 691,888

691,888
Factor Arrows
2345,944
Factor Arrows
2172,972
Factor Arrows
286,486
Factor Arrows
243,243
Factor Arrows
83521

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, 83, 521

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 83 x 521 = 691,888

This can also be written as 24 x 831 x 5211 = 691,888

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


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