Source : Webster's Revised Unabridged Dictionary (1913)

Dividable \Di*vid"a*ble\, a. [From {Divide}.]
   1. Capable of being divided; divisible.

   2. Divided; separated; parted. [Obs.] --Shak.

Source : WordNet®

dividable
     adj : can be divided usually without leaving a remainder; "15 is
           divisible by 3"