I don't see current waveforms considered in your calculation, in so far I don't expect that it's correct for conventional power supplies with filter capacitor. For reasonable filter capacitor values, a "form factor" Irms/Idc of 1.6 for full wave rectifiers and 2.0 for half wave rectifiers is assumed.
PFC power supplies have near to unity power factor, in other words Irms*Vrms ≈ Pout. The fuse dimensioning is often enforced by the inrush current of the PFC bus capacitor, based on the fuse I²t specification with sufficient margin. This can result in unconvenient large fuse rating numbers. Manufacturers sometimes loves to add unreasonable margins on their own, ending up in something like a 3.15 A slow blow fuse for 3W(!) 90 to 260 V input SMPS.
A serious inrush current calculation resulted in a fuse value of 0.16 A, still a multiple of the value according to the real input power.