Factor pairs of 36 are any two numbers that, when multiplied together, equal 36. The question to ask is “what two numbers multiplied together equal 36?” Every factor can be paired with another factor, and multiplying the two will result in 36.
To find the factor pairs of 36, follow these steps:
Step 1:
Find the smallest prime number that is larger than 1, and is a factor of 36. 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 36 by the smallest prime factor, in this case, 2:
36 ÷ 2 = 18
2 and 18 will make a new factor pair.
Step 3:
Repeat Steps 1 and 2, using 18 as the new focus. Find the smallest prime factor that isn’t 1, and divide 18 by that number. In this case, 2 is the new smallest prime factor:
18 ÷ 2 = 9
Remember that this new factor pair is only for the factors of 18, not 36. So, to finish the factor pair for 36, you’d multiply 2 and 2 before pairing with 9:
2 x 2 = 4
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 36:
(1, 36), (2, 18), (3, 12), (4, 9), (6, 6)
So, to list all the factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36
The negative factors of 36 would be: -1, -2, -3, -4, -6, -9, -12, -18, -36