Q: What are the prime factors of the number 221,234,112?

 A: 2, 3, 11, 103, 113

Why are those the prime factors of the number 221,234,112?

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 221,234,112

221,234,112
Factor Arrows
2110,617,056
Factor Arrows
255,308,528
Factor Arrows
227,654,264
Factor Arrows
213,827,132
Factor Arrows
26,913,566
Factor Arrows
23,456,783
Factor Arrows
31,152,261
Factor Arrows
3384,087
Factor Arrows
3128,029
Factor Arrows
1111,639
Factor Arrows
103113

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, 103, 113

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 3 x 3 x 3 x 11 x 103 x 113 = 221,234,112

This can also be written as 26 x 33 x 111 x 1031 x 1131 = 221,234,112

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


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