Q: What are the prime factors of the number 30,021,120?

 A: 2, 3, 5, 1303

Why are those the prime factors of the number 30,021,120?

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 30,021,120

30,021,120
Factor Arrows
215,010,560
Factor Arrows
27,505,280
Factor Arrows
23,752,640
Factor Arrows
21,876,320
Factor Arrows
2938,160
Factor Arrows
2469,080
Factor Arrows
2234,540
Factor Arrows
2117,270
Factor Arrows
258,635
Factor Arrows
319,545
Factor Arrows
36,515
Factor Arrows
51,303

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, 1303

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 2 x 2 x 2 x 3 x 3 x 5 x 1,303 = 30,021,120

This can also be written as 29 x 32 x 51 x 1,3031 = 30,021,120

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


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