Q: What are the prime factors of the number 729,630?

 A: 2, 3, 5, 11, 67

Why are those the prime factors of the number 729,630?

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 729,630

729,630
Factor Arrows
2364,815
Factor Arrows
3121,605
Factor Arrows
340,535
Factor Arrows
58,107
Factor Arrows
11737
Factor Arrows
1167

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, 5, 11, 67

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 11 x 11 x 67 = 729,630

This can also be written as 21 x 32 x 51 x 112 x 671 = 729,630

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


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