Q: What are the prime factors of the number 678,336?

 A: 2, 3, 3533

Why are those the prime factors of the number 678,336?

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 678,336

678,336
Factor Arrows
2339,168
Factor Arrows
2169,584
Factor Arrows
284,792
Factor Arrows
242,396
Factor Arrows
221,198
Factor Arrows
210,599
Factor Arrows
33,533

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, 3533

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 3,533 = 678,336

This can also be written as 26 x 31 x 3,5331 = 678,336

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


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