Respuesta:
48: 1, 2, 3, 48, 24, 16, 12, 8, 6, 4,
20: 1, 20, 10, 2, 5, 4
50: 1, 2, 25, 50, 10
120: 2, 1, 3, 5, 60, 120
189: 2, 1, 63, 27, 189, 3, 21, etc
