New in version 2.0.
Return all multiplier, tempo pairs possible from integer_tempo.
Tempi must be no less than integer_tempo / 2 and not greater than 2 * integer_tempo:
abjad> from abjad.tools import tempotools
abjad> pairs = tempotools.integer_tempo_to_multiplier_tempo_pairs(58, 8, 8)
abjad> for pair in pairs:
... pair
...
(Fraction(1, 2), Fraction(29, 1))
(Fraction(1, 1), Fraction(58, 1))
(Fraction(3, 2), Fraction(87, 1))
(Fraction(2, 1), Fraction(116, 1))
Return list.