Level+level/5+CON modifier. 19+3+12=34. At level 20 the capstone doubles your Hands. So in my case that would become (20+4+12)*2=72. I have the crystal Hand feat though so I lose 1 Hand before it gets doubled so I will only get 70. If I had templates or a race that focused on boosting Con I could have gotten a few more Hands.