It's just a smoothing cap, it has been bashed off the board, those stumps are the plates used to connect to the internal guts of the cap. You will find them on two other corners on that board and they should all be the same. Its worth gently seeing if the others have had been bent to one side too, they can get knocked so one leg gets torn out, but when straightened up the leg will go back into the cap. The cap is wrecked then but it can look normal, gently rock the others and see if you can move the cap body relative to the legs, you shouldn't be able to.
At a wild guess based on the size of it I would say its a 220uF or 470uf 16V.