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The way to calculate the factors of 72 is as follows. First, every number is divisible by itself and 1.

- Try 1. 1 x 72 = 72, so put these into our factor list.
1 ... 72 - Take 2. 2 x 36 = 72, which means we add these to our factor list.
1 2 ... 36 72 - Now take 3. 3 x 24 = 72, so now we put these in our list of factors.
1 2 3 ... 24 36 72 - Next try 4. 4 x 18 = 72, so we add these to our list of factors.
1 2 3 4 ... 18 24 36 72 - Now try 5... nope! 72/5 isn't a whole number. So we skip 5.
- Try 6. 6 x 12 = 72, which means we add these to our factor list.
1 2 3 4 6 ... 12 18 24 36 72 - Take 7... no. 72/7 isn't a whole number. So we skip 7.
- Now take 8. 8 x 9 = 72, so we add these to our list of factors.
1 2 3 4 6 8 ... 9 12 18 24 36 72 - Now, since we don't have any more numbers to try, we're done!
1 2 3 4 6 8 9 12 18 24 36 72

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Need help finding the factors of 72? It's easy! Here you go: the factors of 72 are 1, 2, 3, 4, 6, 8... Randy Tayler | randytayler@gmail.com