Q: What are the prime factors of the number 111,164,438?

 A: 2, 7, 11, 101, 1021

Why are those the prime factors of the number 111,164,438?

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 111,164,438

111,164,438
Factor Arrows
255,582,219
Factor Arrows
77,940,317
Factor Arrows
71,134,331
Factor Arrows
11103,121
Factor Arrows
1011,021

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, 7, 11, 101, 1021

We can check our work by multiplying all of the prime factors together: 2 x 7 x 7 x 11 x 101 x 1,021 = 111,164,438

This can also be written as 21 x 72 x 111 x 1011 x 1,0211 = 111,164,438

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


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