Dragon magazine, the french one, is not a french copy of Dragons magazine. In fact they are totally different magazines with no relation between each others.
And yes, "Rabbi Jacob" (;)) has right, there was 46, from 0 to 45.
After the last issue, the magazine changed his name to Multimondes.
This magazine is particularly written to describe fantasy world and to give gaming aids related to them, and of course designed for games like AD&D and especially AD&D2 but not only for them.
You can find cover pictures and contains here
http://chg96.free.fr/grenier/imaginaires/index.htm
And I put a bunch of copies on ebay actually
