Most languages have a fully developed concept of numbers but many do not, for instance most Australian Aboriginal languages lack numbers and counting beyond a few such as 1, 2, and 3.
Many languages have indefinite articles like "a" and "an" of English but even many major world languages lack them.
In all the languages I'm familiar with if they have an indefinite article it is related to or the same as the number for "one", perhaps with inflections etc.
Are there any known languages however which have an indefinite article despite lacking a fully developed number system? Is it a linguistic universal that languages with an indefinite article always also have a number system?