Q: What are the prime factors of the number 243,049,728?

 A: 2, 3, 316471

Why are those the prime factors of the number 243,049,728?

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 243,049,728

243,049,728
Factor Arrows
2121,524,864
Factor Arrows
260,762,432
Factor Arrows
230,381,216
Factor Arrows
215,190,608
Factor Arrows
27,595,304
Factor Arrows
23,797,652
Factor Arrows
21,898,826
Factor Arrows
2949,413
Factor Arrows
3316,471

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, 316471

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 316,471 = 243,049,728

This can also be written as 28 x 31 x 316,4711 = 243,049,728

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


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