If you defeat, let's say, a Patrat.
It gives you 1 Attack IV.
But if you're having Pokérus, it gives you 2 Attack IV's. (x2)
If you have the Power Bracer on, it gives you 5 Attack IV's. (+4)
If you have Pokérus AND the Power Bracer, it gives you 10 Attack IV's. (+4 x2)
EDIT: Also, please don't...