Q: What are the prime factors of the number 221,340,304?

 A: 2, 41, 79, 4271

Why are those the prime factors of the number 221,340,304?

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 221,340,304

221,340,304
Factor Arrows
2110,670,152
Factor Arrows
255,335,076
Factor Arrows
227,667,538
Factor Arrows
213,833,769
Factor Arrows
41337,409
Factor Arrows
794,271

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, 41, 79, 4271

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 41 x 79 x 4,271 = 221,340,304

This can also be written as 24 x 411 x 791 x 4,2711 = 221,340,304

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


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