Q: What are the prime factors of the number 500,521,872?

 A: 2, 3, 73, 83, 1721

Why are those the prime factors of the number 500,521,872?

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 500,521,872

500,521,872
Factor Arrows
2250,260,936
Factor Arrows
2125,130,468
Factor Arrows
262,565,234
Factor Arrows
231,282,617
Factor Arrows
310,427,539
Factor Arrows
73142,843
Factor Arrows
831,721

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, 73, 83, 1721

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 73 x 83 x 1,721 = 500,521,872

This can also be written as 24 x 31 x 731 x 831 x 1,7211 = 500,521,872

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


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