What is the least common factor of 9 and 51?

To answer the question, "What is the least common factor of 9 and 51?", we will start by defining and listing factors of 9 and 51.

Factors of 9 are all the integers that when multiplied by another integer equal 9. Likewise, factors of 51 are all the integers that when multiplied by another integer equal 51.

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

The factors 51 are 1, 3, 17, and 51.

When you ask, "What is the least common factor of 9 and 51?", least is the key word here. Least means smallest. Thus, the smallest or least common factor that 9 and 51 have in common is 1.

Note that all integers, such as 9 and 51, 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 51, you may also be interested in knowing the greatest common factor of 9 and 51. The greatest factor 9 and 51 have in common, per the list above, is 3.

When you asked for the least common factor of 9 and 51, did you mean least common multiple? If so, the least common multiple of 9 and 51 is 153.

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