Q: What are the prime factors of the number 688,512?

 A: 2, 3, 11, 163

Why are those the prime factors of the number 688,512?

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 688,512

688,512
Factor Arrows
2344,256
Factor Arrows
2172,128
Factor Arrows
286,064
Factor Arrows
243,032
Factor Arrows
221,516
Factor Arrows
210,758
Factor Arrows
25,379
Factor Arrows
31,793
Factor Arrows
11163

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, 11, 163

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 3 x 11 x 163 = 688,512

This can also be written as 27 x 31 x 111 x 1631 = 688,512

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


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