Q: What are the prime factors of the number 5,245,728?

 A: 2, 3, 53, 1031

Why are those the prime factors of the number 5,245,728?

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 5,245,728

5,245,728
Factor Arrows
22,622,864
Factor Arrows
21,311,432
Factor Arrows
2655,716
Factor Arrows
2327,858
Factor Arrows
2163,929
Factor Arrows
354,643
Factor Arrows
531,031

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, 53, 1031

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 53 x 1,031 = 5,245,728

This can also be written as 25 x 31 x 531 x 1,0311 = 5,245,728

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


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