Q: What are the prime factors of the number 30,329,640?

 A: 2, 3, 5, 11, 23, 37

Why are those the prime factors of the number 30,329,640?

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 30,329,640

30,329,640
Factor Arrows
215,164,820
Factor Arrows
27,582,410
Factor Arrows
23,791,205
Factor Arrows
31,263,735
Factor Arrows
3421,245
Factor Arrows
3140,415
Factor Arrows
346,805
Factor Arrows
59,361
Factor Arrows
11851
Factor Arrows
2337

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, 23, 37

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 5 x 11 x 23 x 37 = 30,329,640

This can also be written as 23 x 34 x 51 x 111 x 231 x 371 = 30,329,640

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


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