What is the least common factor of 9 and 28?

To answer the question, "What is the least common factor of 9 and 28?", we will start by defining and listing factors of 9 and 28.

Factors of 9 are all the integers that when multiplied by another integer equal 9. Likewise, factors of 28 are all the integers that when multiplied by another integer equal 28.

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

The factors 28 are 1, 2, 4, 7, 14, and 28.

When you ask, "What is the least common factor of 9 and 28?", least is the key word here. Least means smallest. Thus, the smallest or least common factor that 9 and 28 have in common is 1.

Note that all integers, such as 9 and 28, 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 28, you may also be interested in knowing the greatest common factor of 9 and 28. The greatest factor 9 and 28 have in common, per the list above, is 1.

When you asked for the least common factor of 9 and 28, did you mean least common multiple? If so, the least common multiple of 9 and 28 is 252.

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