If you think about it, how much elven or
maia blood is really left when you get to
Aragorn?
Elrond and
Elros are only 1/16 Maia by blood. By the time you get to the 11th king of
Numenor (Tar-minastir) you have somoene with only 1/16384 maia blood. And
Elendil is of the
sam generation as
Ar-Pharazon, the 25th king!! Their elven blood is only slightly thicker at this point (9 times as much, or 9/16384). And every generation is cutting each one of those in hafl, until Aragorn marries
Arwen.
Fun to work out, but for all intents and purposes, Aragorn is just a man (a
Dunedain though...).
Elrond and Elros (assuming an even contribution from each of their forebears) are 3/8
Edain, 9/16
Elf, and 1/16 Maia. Shall we call them the slightly-more-than-half-elven?