Q: What are the prime factors of the number 5,293,728?

 A: 2, 3, 11, 557

Why are those the prime factors of the number 5,293,728?

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 5,293,728

5,293,728
Factor Arrows
22,646,864
Factor Arrows
21,323,432
Factor Arrows
2661,716
Factor Arrows
2330,858
Factor Arrows
2165,429
Factor Arrows
355,143
Factor Arrows
318,381
Factor Arrows
36,127
Factor Arrows
11557

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, 11, 557

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 3 x 3 x 11 x 557 = 5,293,728

This can also be written as 25 x 33 x 111 x 5571 = 5,293,728

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


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