The kanji is 数えてない which means "hasn't been counting", implying she hasn't kept track of her age; thus in this context, "Doesn't remember" fits the translation nicely (rather than the literal translation).
For the record, "Uncountable" would actually be 数えられない.
Dragongirl-san
more literally drag-girl-san, but sounds rather strange so...Weight: HeavyAge: Doesn't rememberPersonality:
Meat☆eaterHeight: About 20m