56,156,256 LCM BY DIVISION METHOD

Answer : 

We find LCM ( 56 , 156 , 256 ) , As : 

So, 

 LCM ( 56 , 156 , 256 ) = 2 x  2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 7 x 13  = ​69888                                                   ( Ans )