Q: What are the prime factors of the number 553,728?

 A: 2, 3, 7, 103

Why are those the prime factors of the number 553,728?

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 553,728

553,728
Factor Arrows
2276,864
Factor Arrows
2138,432
Factor Arrows
269,216
Factor Arrows
234,608
Factor Arrows
217,304
Factor Arrows
28,652
Factor Arrows
24,326
Factor Arrows
22,163
Factor Arrows
3721
Factor Arrows
7103

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, 7, 103

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 2 x 3 x 7 x 103 = 553,728

This can also be written as 28 x 31 x 71 x 1031 = 553,728

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


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