What is the least common factor of 9 and 16?

To answer the question, "What is the least common factor of 9 and 16?", we will start by defining and listing factors of 9 and 16.

Factors of 9 are all the integers that when multiplied by another integer equal 9. Likewise, factors of 16 are all the integers that when multiplied by another integer equal 16.

The factors of 9 are 1, 3, and 9.

The factors 16 are 1, 2, 4, 8, and 16.

When you ask, "What is the least common factor of 9 and 16?", least is the key word here. Least means smallest. Thus, the smallest or least common factor that 9 and 16 have in common is 1.

Note that all integers, such as 9 and 16, 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 9 and 16, you may also be interested in knowing the greatest common factor of 9 and 16. The greatest factor 9 and 16 have in common, per the list above, is 1.

When you asked for the least common factor of 9 and 16, did you mean least common multiple? If so, the least common multiple of 9 and 16 is 144.

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