Q: What are the prime factors of the number 30,907,968?

 A: 2, 3, 7, 13, 29, 61

Why are those the prime factors of the number 30,907,968?

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 30,907,968

30,907,968
Factor Arrows
215,453,984
Factor Arrows
27,726,992
Factor Arrows
23,863,496
Factor Arrows
21,931,748
Factor Arrows
2965,874
Factor Arrows
2482,937
Factor Arrows
3160,979
Factor Arrows
722,997
Factor Arrows
131,769
Factor Arrows
2961

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, 13, 29, 61

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 7 x 13 x 29 x 61 = 30,907,968

This can also be written as 26 x 31 x 71 x 131 x 291 x 611 = 30,907,968

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


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