I get that the 5252 is a constant (and almost understand where it comes from!)... If you plug in 2626 as rpm with a 5252 divisor, you will get 1/2... Which would always equate to HP being half of Torque at 2626 RPM...
For that particular RPM, in theory, yes. But then you get into dyno accuracy etc. most dynos measure rpm by hundred or at the lowest 10 rpm. Which throws that off