Ответ:

1. 48 = 6 * 8 = 12 * 4 = 2 * 24 = 3 * 16 = 48 * 1
2. 72 = 36 * 2 = 12 * 6 = 9 * 8 = 72 * 1 = 3 * 24 = 4 * 18