Q: What are the prime factors of the number 515,021,120?

 A: 2, 5, 17, 5569

Why are those the prime factors of the number 515,021,120?

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 515,021,120

515,021,120
Factor Arrows
2257,510,560
Factor Arrows
2128,755,280
Factor Arrows
264,377,640
Factor Arrows
232,188,820
Factor Arrows
216,094,410
Factor Arrows
28,047,205
Factor Arrows
51,609,441
Factor Arrows
1794,673
Factor Arrows
175,569

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, 17, 5569

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 17 x 17 x 5,569 = 515,021,120

This can also be written as 26 x 51 x 172 x 5,5691 = 515,021,120

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


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