Q: What are the prime factors of the number 553,555,520?

 A: 2, 5, 7, 37, 6679

Why are those the prime factors of the number 553,555,520?

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 553,555,520

553,555,520
Factor Arrows
2276,777,760
Factor Arrows
2138,388,880
Factor Arrows
269,194,440
Factor Arrows
234,597,220
Factor Arrows
217,298,610
Factor Arrows
28,649,305
Factor Arrows
51,729,861
Factor Arrows
7247,123
Factor Arrows
376,679

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, 7, 37, 6679

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 5 x 7 x 37 x 6,679 = 553,555,520

This can also be written as 26 x 51 x 71 x 371 x 6,6791 = 553,555,520

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


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