Power supplies that take AC line power, rectify it to DC and then use a DC-DC converter to generate whatever output is desired seem fairly common. Those that I've dissected don't seem to have any inductors between the caps and the AC line.
What's the power factor in such a setup? It's clearly not zero, because some power gets to the load, but all the AC line sees is a pure reactance, unless the rectifier does something close to magic.
Thanks for reading,
bob prohaska