Q: What are the prime factors of the number 30,223,200?

 A: 2, 3, 5, 7, 257

Why are those the prime factors of the number 30,223,200?

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 30,223,200

30,223,200
Factor Arrows
215,111,600
Factor Arrows
27,555,800
Factor Arrows
23,777,900
Factor Arrows
21,888,950
Factor Arrows
2944,475
Factor Arrows
3314,825
Factor Arrows
562,965
Factor Arrows
512,593
Factor Arrows
71,799
Factor Arrows
7257

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, 7, 257

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 5 x 5 x 7 x 7 x 257 = 30,223,200

This can also be written as 25 x 31 x 52 x 72 x 2571 = 30,223,200

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


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