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What Are the Factors of 81?

The factors of 81 are 1, 3, 9, 27, 81.

Here is how you calculate the factors of 81. 1 and 81 are the first two factors.


  1. Try 1. 1 x 81 = 81, so put these into our factor list.
    1...81

  2. Take 2... no good. 81/2 isn't a whole number. So we skip 2.

  3. Now take 3. 3 x 27 = 81, so now we put these in our list of factors.
    13...2781

  4. Next try 4... no luck. 81/4 isn't a whole number. So we skip 4.

  5. Now try 5... nope! 81/5 isn't a whole number. So we skip 5.

  6. Try 6... no good. 81/6 isn't a whole number. So we skip 6.

  7. Take 7... no. 81/7 isn't a whole number. So we skip 7.

  8. Now take 8... no luck. 81/8 isn't a whole number. So we skip 8.

  9. Next try 9. 9 x 9 = 81, so we add it to our list of factors. There are no numbers between 9 and itself, so we can stop.
    1392781



Try another number:

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Need help finding the factors of 81? It's easy! Here you go: the factors of 81 are 1, 3, 9... Randy Tayler | randytayler@gmail.com