Q: What are the prime factors of the number 520,553,664?

 A: 2, 3, 23, 39293

Why are those the prime factors of the number 520,553,664?

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 520,553,664

520,553,664
Factor Arrows
2260,276,832
Factor Arrows
2130,138,416
Factor Arrows
265,069,208
Factor Arrows
232,534,604
Factor Arrows
216,267,302
Factor Arrows
28,133,651
Factor Arrows
32,711,217
Factor Arrows
3903,739
Factor Arrows
2339,293

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, 23, 39293

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 3 x 3 x 23 x 39,293 = 520,553,664

This can also be written as 26 x 32 x 231 x 39,2931 = 520,553,664

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


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