Q: What are the prime factors of the number 515,016,144?

 A: 2, 3, 31, 4273

Why are those the prime factors of the number 515,016,144?

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 515,016,144

515,016,144
Factor Arrows
2257,508,072
Factor Arrows
2128,754,036
Factor Arrows
264,377,018
Factor Arrows
232,188,509
Factor Arrows
310,729,503
Factor Arrows
33,576,501
Factor Arrows
31,192,167
Factor Arrows
3397,389
Factor Arrows
3132,463
Factor Arrows
314,273

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, 31, 4273

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 3 x 3 x 31 x 4,273 = 515,016,144

This can also be written as 24 x 35 x 311 x 4,2731 = 515,016,144

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


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