In the absence of any to choose from, there is no definitive answer. Numbers don't stop in either direction. There is no number so small that you can't think of one less.
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One has one factor.
The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The least multiple of a number is itself.
The least common multiple, or LCM.
at least three factors.
That's known as the least common multiple, or LCM.