Since this is a single number, you could say that it shares all of its multiples with itself. So the least multiple of the number is itself. However, determining a least common multiple generally requires at least two numbers from which to find the LCM.
You need at least two numbers to find an LCM.
The least common multiple of 21 , 19 = 399
The least common multiple of 6 , 21 = 42
The Least Common Multiple (LCM) for 49 63 21 is 441.
The least common multiple of 21 and 33 is 231.
Least Common Multiple (LCM) for 32 21 is 672
Least Common Multiple (LCM) for 21 33 is 231.
The Least Common Multiple (LCM) for 51 21 is 357.
Least common multiple of 21 and 306 is 2142.
The Least Common Multiple (LCM) for 27 21 is 189.
Least Common Multiple (LCM) for 21 26 is 546.
The Least Common Multiple (LCM) for 21 70 is 210.
The Least Common Multiple (LCM) for 39 21 is 273.