Remove powers of 2 from the factors of positive integer n:
abjad> from abjad.tools import mathtools
abjad> for n in range(10, 100, 10):
... print '\t%s\t%s' % (n, mathtools.remove_powers_of_two(n))
...
10 5
20 5
30 15
40 5
50 25
60 15
70 35
80 5
90 45
Raise type error on noninteger n.
Raise value error on nonpositive n.
Return positive integer.