Q: What are the prime factors of the number 691,008?

 A: 2, 3, 59, 61

Why are those the prime factors of the number 691,008?

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 691,008

691,008
Factor Arrows
2345,504
Factor Arrows
2172,752
Factor Arrows
286,376
Factor Arrows
243,188
Factor Arrows
221,594
Factor Arrows
210,797
Factor Arrows
33,599
Factor Arrows
5961

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, 59, 61

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 3 x 59 x 61 = 691,008

This can also be written as 26 x 31 x 591 x 611 = 691,008

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


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