Q: What are the prime factors of the number 30,431,680?

 A: 2, 5, 61, 1559

Why are those the prime factors of the number 30,431,680?

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 30,431,680

30,431,680
Factor Arrows
215,215,840
Factor Arrows
27,607,920
Factor Arrows
23,803,960
Factor Arrows
21,901,980
Factor Arrows
2950,990
Factor Arrows
2475,495
Factor Arrows
595,099
Factor Arrows
611,559

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, 5, 61, 1559

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 5 x 61 x 1,559 = 30,431,680

This can also be written as 26 x 51 x 611 x 1,5591 = 30,431,680

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


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