Is 81 a factor of 729?

Here we will show you two different methods you can use to determine if 81 is a factor of 729.

The first method entails simply listing all factors of 729 and then seeing if 81 is one of them. The factors of 729 are 1, 3, 9, 27, 81, 243, and 729. Looking at the list, you see that 81 is on the list, and the answer to "Is 81 a factor of 729?" is therefore yes.

For the second and perhaps easier method, we divide 729 by 81 to see if the quotient is a whole number or fractional number. If the quotient is a whole number, then 81 is a factor of 729. If the quotient is a fractional number, then 81 is not a factor of 729.

729 divided by 81 is 9 which is a whole number. Thus, once again, the answer to "Is 81 a factor of 729?" is yes.

Factor Checker
Need to do another factor check? No problem! You are welcome to submit a similar problem below.

Is 81 a factor of 730?
Now you know that 81 is a factor of 729. Here is the next problem on our list that our Factor Checker explained and solved.