а) 4! = 4 * 3 * 2 * 1 = 24. Делители: 1, 2, 3, 4, 6, 8, 12, 24.
б) 5! = 5 * 4 * 3 * 2 * 1 = 120. Делители: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120.
в) 6! = 6 * 5 * 4 * 3 * 2 * 1 = 720. Делители: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720.