Q: What are the prime factors of the number 668,768?

 A: 2, 20899

Why are those the prime factors of the number 668,768?

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 668,768

668,768
Factor Arrows
2334,384
Factor Arrows
2167,192
Factor Arrows
283,596
Factor Arrows
241,798
Factor Arrows
220,899

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, 20899

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 20,899 = 668,768

This can also be written as 25 x 20,8991 = 668,768

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


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