New in version 2.0.
Divide sequence elements by greatest common divisor:
abjad> from abjad.tools import sequencetools
abjad> sequencetools.divide_sequence_elements_by_greatest_common_divisor([2, 2, -8, -16])
[1, 1, -4, -8]
Allow negative sequence elements.
Raise type error on noninteger sequence elements.
Raise not implemented error when 0 in sequence.
Return new sequence object.