Q: What are the prime factors of the number 221,131,350?

 A: 2, 3, 5, 11, 14891

Why are those the prime factors of the number 221,131,350?

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 221,131,350

221,131,350
Factor Arrows
2110,565,675
Factor Arrows
336,855,225
Factor Arrows
312,285,075
Factor Arrows
34,095,025
Factor Arrows
5819,005
Factor Arrows
5163,801
Factor Arrows
1114,891

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, 5, 11, 14891

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 5 x 5 x 11 x 14,891 = 221,131,350

This can also be written as 21 x 33 x 52 x 111 x 14,8911 = 221,131,350

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


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