Q: What are the prime factors of the number 30,155,328?

 A: 2, 3, 7, 277

Why are those the prime factors of the number 30,155,328?

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 30,155,328

30,155,328
Factor Arrows
215,077,664
Factor Arrows
27,538,832
Factor Arrows
23,769,416
Factor Arrows
21,884,708
Factor Arrows
2942,354
Factor Arrows
2471,177
Factor Arrows
3157,059
Factor Arrows
352,353
Factor Arrows
317,451
Factor Arrows
35,817
Factor Arrows
31,939
Factor Arrows
7277

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, 7, 277

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 x 3 x 3 x 3 x 7 x 277 = 30,155,328

This can also be written as 26 x 35 x 71 x 2771 = 30,155,328

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


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