Also is there a computer program that can calculate the factors (some or many) effecting the concentration values of radon and radium in such various environments?
Yes, it is possible to calculate the factors affecting Radon indoors using computer programme. Generally, Meteorological parameters ( Temperature, Pressure, Wind velocity, Humidity) affect radon emission in soil. The effect of Parameters can be evaluated by using a Computer programme. I am not sure about any such programme about radium in soil.
You can see two of my papers on Research Gate : Statistical model for the recognition of buried uranium deposit and Optimum radon emanometric technique.