What is the least common factor of 5 and 4?

To answer the question, "What is the least common factor of 5 and 4?", we will start by defining and listing factors of 5 and 4.

Factors of 5 are all the integers that when multiplied by another integer equal 5. Likewise, factors of 4 are all the integers that when multiplied by another integer equal 4.

The factors of 5 are 1 and 5.

The factors 4 are 1, 2, and 4.

When you ask, "What is the least common factor of 5 and 4?", least is the key word here. Least means smallest. Thus, the smallest or least common factor that 5 and 4 have in common is 1.

Note that all integers, such as 5 and 4, 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 5 and 4, you may also be interested in knowing the greatest common factor of 5 and 4. The greatest factor 5 and 4 have in common, per the list above, is 1.

When you asked for the least common factor of 5 and 4, did you mean least common multiple? If so, the least common multiple of 5 and 4 is 20.

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