Q: What are the prime factors of the number 515,648?

 A: 2, 7, 1151

Why are those the prime factors of the number 515,648?

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 515,648

515,648
Factor Arrows
2257,824
Factor Arrows
2128,912
Factor Arrows
264,456
Factor Arrows
232,228
Factor Arrows
216,114
Factor Arrows
28,057
Factor Arrows
71,151

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, 7, 1151

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 7 x 1,151 = 515,648

This can also be written as 26 x 71 x 1,1511 = 515,648

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


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