Q: What are the prime factors of the number 729,684?

 A: 2, 3, 20269

Why are those the prime factors of the number 729,684?

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 729,684

729,684
Factor Arrows
2364,842
Factor Arrows
2182,421
Factor Arrows
360,807
Factor Arrows
320,269

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, 20269

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 20,269 = 729,684

This can also be written as 22 x 32 x 20,2691 = 729,684

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


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