When using a parallel resistor from the input to ground then the equations are a little more complicated but not too much. The easiest way is to first calculate the overall parallel resistance of the RP and the 320000 input resistance of the module.

With say a resistance of 33K this would be 320K || 33K = 29915Ohms

The ADC input is still 100000/320000 = 0.3125 of the module input voltage

So RT 1M gives 3.3 * 29915 / 1029915 module voltage or 0.03V ADC

100K gives 3.3 * 29915 / 129915 module voltage or 0.237V ADC

10K gives 3.3 * 29915 / 39915 module voltage or 0.772V ADC

1K gives 3.3 * 29915 / 30915 module voltage or 1.037V ADC

As you can see this almost fits into the ADC range but the precision is going to be poor at the extremes of the range. This is sort of what you would expect as the ADC is only 10 bit and you are trying to measure a range of 1000 times. The other challenge is that I don't think the ADC is very good at near 0V input.

If you wanted better precison over the range then you would need to think about using some sort of linearising circuit for the thermistor.