There is no highest common multiple - for whatever value you come up with, I can always add the lowest common multiple and get another, even higher common multiple.
There is the:
By itself 121827 cannot have a common anything as that requires two or more numbers; however, I suspect that there are spaces missing and your list of numbers is actually {12, 18, 27}, giving
If neither, please re-enter your question with a proper number list and hcf/lcm requirement.
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There is no limit to the size of the highest common multiple. Highest common factor is 2 and lowest common multiple is 176.
The highest common multiple of any set of integers is infinite.
The highest common multiple of any set of integers is infinite.
the highest common multiple of 14 and 18 is 2
The highest is infinity, because numbers go on for ever. The highest common factor is 6 and lowest common multiple is 60.