Q: What are the prime factors of the number 30,043,440?

 A: 2, 3, 5, 7, 1987

Why are those the prime factors of the number 30,043,440?

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 30,043,440

30,043,440
Factor Arrows
215,021,720
Factor Arrows
27,510,860
Factor Arrows
23,755,430
Factor Arrows
21,877,715
Factor Arrows
3625,905
Factor Arrows
3208,635
Factor Arrows
369,545
Factor Arrows
513,909
Factor Arrows
71,987

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, 1987

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 7 x 1,987 = 30,043,440

This can also be written as 24 x 33 x 51 x 71 x 1,9871 = 30,043,440

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


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