What is the least common factor of 4 and 81?

To answer the question, "What is the least common factor of 4 and 81?", we will start by defining and listing factors of 4 and 81.

Factors of 4 are all the integers that when multiplied by another integer equal 4. Likewise, factors of 81 are all the integers that when multiplied by another integer equal 81.

The factors of 4 are 1, 2, and 4.

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

When you ask, "What is the least common factor of 4 and 81?", least is the key word here. Least means smallest. Thus, the smallest or least common factor that 4 and 81 have in common is 1.

Note that all integers, such as 4 and 81, have 1 as one of its factors. Thus, the answer to the least common factor of any two integers greater than 0 will always be 1.

Now that you know the least common factor of 4 and 81, you may also be interested in knowing the greatest common factor of 4 and 81. The greatest factor 4 and 81 have in common, per the list above, is 1.

When you asked for the least common factor of 4 and 81, did you mean least common multiple? If so, the least common multiple of 4 and 81 is 324.

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