Badly burned hand on pan sitting on unlit burner
Natural Gas/Methane burns at ~1950 C in air. Propane burns at 1980 C in the same conditions.

This is hot enough to burn you if exposed directly, so any pilot light will be hot enough to burn you if you were to touch the flame.

The question of "will a pan get hot enough to burn me from the pilot light" has the every popular answer of 'it depends'. if the pan is very heavy, has a high specific heat, or is too far away from the pilot light to be heated effectively, then it might not get hot enough to burn you.

You said that the pan was thin, and aluminum. Aluminum has a specific heat of only 0.9. This means that relative to other materials, it heats up very easily, and cools off very easily. It also means that it does not hold much heat. 

A thin aluminum pan that is directly above and physically close to a natural gas pilot light will quickly heat up a few hundred degrees centigrade. Human skin burns at as low as 44 C over a long time period, and will very quickly burn at only 80 C. Source (Warning: Moderately graphic images of burns... nothing that will sear itself into your mind but still not fun to look at.)

So... it depends, but it's certainly possible - as long as the pan isn't cooling off hotter than the pilot light can warm it, it can reach burn temperatures.