Q: What are the prime factors of the number 307,128?

 A: 2, 3, 67, 191

Why are those the prime factors of the number 307,128?

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 307,128

307,128
Factor Arrows
2153,564
Factor Arrows
276,782
Factor Arrows
238,391
Factor Arrows
312,797
Factor Arrows
67191

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, 67, 191

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 67 x 191 = 307,128

This can also be written as 23 x 31 x 671 x 1911 = 307,128

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


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