Factor pairs of 111 are any two numbers that, when multiplied together, equal 111. The question to ask is “what two numbers multiplied together equal 111?” Every factor can be paired with another factor, and multiplying the two will result in 111.
To find the factor pairs of 111, follow these steps:
Step 1:
Find the smallest prime number that is larger than 1, and is a factor of 111. For reference, the first prime numbers to check are 2, 3, 5, 7, 11, and 13. In this case, the smallest factor that’s a prime number larger than 1 is 3.
Step 2:
Divide 111 by the smallest prime factor, in this case, 3:
111 ÷ 3 = 37
3 and 37 will make a new factor pair.
Step 3:
Repeat Steps 1 and 2, using 37 as the new focus. Find the smallest prime factor that isn’t 1, and divide 37 by that number. In this case, 37 is the new smallest prime factor:
37 ÷ 37 = 1
Remember that this new factor pair is only for the factors of 37, not 111. So, to finish the factor pair for 111, you’d multiply 3 and 37 before pairing with 1:
3 x 37 = 111
Step 4:
Repeat this process until there are no longer any prime factors larger than one to divide by. At the end, you should have the full list of factor pairs.
Here are all the factor pairs for 111:
(1, 111), (3, 37)
So, to list all the factors of 111: 1, 3, 37, 111
The negative factors of 111 would be: -1, -3, -37, -111