Q: What are the prime factors of the number 555,040,320?

 A: 2, 3, 5, 578167

Why are those the prime factors of the number 555,040,320?

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 555,040,320

555,040,320
Factor Arrows
2277,520,160
Factor Arrows
2138,760,080
Factor Arrows
269,380,040
Factor Arrows
234,690,020
Factor Arrows
217,345,010
Factor Arrows
28,672,505
Factor Arrows
32,890,835
Factor Arrows
5578,167

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, 5, 578167

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 5 x 578,167 = 555,040,320

This can also be written as 26 x 31 x 51 x 578,1671 = 555,040,320

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


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