Q: What are the prime factors of the number 515,325,408?

 A: 2, 3, 13, 67, 6163

Why are those the prime factors of the number 515,325,408?

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 515,325,408

515,325,408
Factor Arrows
2257,662,704
Factor Arrows
2128,831,352
Factor Arrows
264,415,676
Factor Arrows
232,207,838
Factor Arrows
216,103,919
Factor Arrows
35,367,973
Factor Arrows
13412,921
Factor Arrows
676,163

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, 13, 67, 6163

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 13 x 67 x 6,163 = 515,325,408

This can also be written as 25 x 31 x 131 x 671 x 6,1631 = 515,325,408

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


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