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Mathematics ... The greatest common factor of lianliankan is 6, 8, 12, 14 and 2.
8 and 14, the greatest common factor is 12, and the smallest common multiple is 96.

28 and 42, the greatest common factor is 14, and the smallest common multiple is 84.

18 and 30, the greatest common factor is 6 and the smallest common multiple is 90.

16 and 24, the greatest common factor is 8 and the smallest common multiple is 48.

24 and 36, the greatest common factor is 12, and the smallest common multiple is 72.