Q: What are the prime factors of the number 305,356,372?

 A: 2, 19, 23, 73, 2393

Why are those the prime factors of the number 305,356,372?

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 305,356,372

305,356,372
Factor Arrows
2152,678,186
Factor Arrows
276,339,093
Factor Arrows
194,017,847
Factor Arrows
23174,689
Factor Arrows
732,393

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, 19, 23, 73, 2393

We can check our work by multiplying all of the prime factors together: 2 x 2 x 19 x 23 x 73 x 2,393 = 305,356,372

This can also be written as 22 x 191 x 231 x 731 x 2,3931 = 305,356,372

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


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