Factor pairs of 66 are any two numbers that, when multiplied together, equal 66. The question to ask is “what two numbers multiplied together equal 66?” Every factor can be paired with another factor, and multiplying the two will result in 66.
To find the factor pairs of 66, follow these steps:
Step 1:
Find the smallest prime number that is larger than 1, and is a factor of 66. 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 2.
Step 2:
Divide 66 by the smallest prime factor, in this case, 2:
66 ÷ 2 = 33
2 and 33 will make a new factor pair.
Step 3:
Repeat Steps 1 and 2, using 33 as the new focus. Find the smallest prime factor that isn’t 1, and divide 33 by that number. In this case, 3 is the new smallest prime factor:
33 ÷ 3 = 11
Remember that this new factor pair is only for the factors of 33, not 66. So, to finish the factor pair for 66, you’d multiply 2 and 3 before pairing with 11:
2 x 3 = 6
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 66:
(1, 66), (2, 33), (3, 22), (6, 11)
So, to list all the factors of 66: 1, 2, 3, 6, 11, 22, 33, 66
The negative factors of 66 would be: -1, -2, -3, -6, -11, -22, -33, -66