What is the least common factor of 21 and 50?

To answer the question, "What is the least common factor of 21 and 50?", we will start by defining and listing factors of 21 and 50.

Factors of 21 are all the integers that when multiplied by another integer equal 21. Likewise, factors of 50 are all the integers that when multiplied by another integer equal 50.

The factors of 21 are 1, 3, 7, and 21.

The factors 50 are 1, 2, 5, 10, 25, and 50.

When you ask, "What is the least common factor of 21 and 50?", least is the key word here. Least means smallest. Thus, the smallest or least common factor that 21 and 50 have in common is 1.

Note that all integers, such as 21 and 50, 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 21 and 50, you may also be interested in knowing the greatest common factor of 21 and 50. The greatest factor 21 and 50 have in common, per the list above, is 1.

When you asked for the least common factor of 21 and 50, did you mean least common multiple? If so, the least common multiple of 21 and 50 is 1050.

Least Common Factor Calculator
Need the least common factor for another set of numbers? Please submit your numbers here:

What is the least common factor of 21 and 51?
Go here for the next least common factor problem on our list.