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To get the Least Common Multiple (LCM) of 1212122 and 4 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:
|1212122: ||2|| ||331||1831|
|4: ||2||2|| || |
The Least Common Multiple (LCM) is: 2 x 2 x 331 x 1831 = 2424244