Q: What are the prime factors of the number 519,040?

 A: 2, 5, 811

Why are those the prime factors of the number 519,040?

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 519,040

519,040
Factor Arrows
2259,520
Factor Arrows
2129,760
Factor Arrows
264,880
Factor Arrows
232,440
Factor Arrows
216,220
Factor Arrows
28,110
Factor Arrows
24,055
Factor Arrows
5811

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, 811

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 2 x 5 x 811 = 519,040

This can also be written as 27 x 51 x 8111 = 519,040

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


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