Q: What are the prime factors of the number 691,712?

 A: 2, 7, 193

Why are those the prime factors of the number 691,712?

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 691,712

691,712
Factor Arrows
2345,856
Factor Arrows
2172,928
Factor Arrows
286,464
Factor Arrows
243,232
Factor Arrows
221,616
Factor Arrows
210,808
Factor Arrows
25,404
Factor Arrows
22,702
Factor Arrows
21,351
Factor Arrows
7193

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, 193

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 2 x 7 x 193 = 691,712

This can also be written as 29 x 71 x 1931 = 691,712

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


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