Q: What are the prime factors of the number 228,421,728?

 A: 2, 3, 241, 1097

Why are those the prime factors of the number 228,421,728?

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 228,421,728

228,421,728
Factor Arrows
2114,210,864
Factor Arrows
257,105,432
Factor Arrows
228,552,716
Factor Arrows
214,276,358
Factor Arrows
27,138,179
Factor Arrows
32,379,393
Factor Arrows
3793,131
Factor Arrows
3264,377
Factor Arrows
2411,097

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, 241, 1097

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 241 x 1,097 = 228,421,728

This can also be written as 25 x 33 x 2411 x 1,0971 = 228,421,728

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


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