It turned out that I made a really stupid mistake. When I was looking up Coulomb in base units since I don't know it offhand, I apparently misread it as A/s instead of A*s. Everything works out now. Thanks for replying, everyone. It helped me narrow down to the part of the equation I was messing...
So I'm doing research with a professor and he wants me to use the Bethe formula to calculate stopping power for alpha particles of various energies, but I'm having a lot of trouble using it, and I figured I'd ask here before I bothered him.
He wanted me to use the non-relativistic version listed...