Factor pairs of 64 are any two numbers that, when multiplied together, equal 64. The question to ask is “what two numbers multiplied together equal 64?” Every factor can be paired with another factor, and multiplying the two will result in 64.
To find the factor pairs of 64, follow these steps:
Step 1:
Find the smallest prime number that is larger than 1, and is a factor of 64. 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 64 by the smallest prime factor, in this case, 2:
64 ÷ 2 = 32
2 and 32 will make a new factor pair.
Step 3:
Repeat Steps 1 and 2, using 32 as the new focus. Find the smallest prime factor that isn’t 1, and divide 32 by that number. In this case, 2 is the new smallest prime factor:
32 ÷ 2 = 16
Remember that this new factor pair is only for the factors of 32, not 64. So, to finish the factor pair for 64, you’d multiply 2 and 2 before pairing with 16:
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 64:
(1, 64), (2, 32), (4, 16), (8, 8)
So, to list all the factors of 64: 1, 2, 4, 8, 16, 32, 64
The negative factors of 64 would be: -1, -2, -4, -8, -16, -32, -64