Least common multiple of 16 and 20

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What is the least common multiple of 16 and 20

The least common multiple of 20 and 8 is () and the greatest common factor is

The least common multiple of 20 and 8 is (40), and the greatest common factor is (4)
　　20=5×2×2,
　　8=2×2×2,
The least common multiple of 20 and 8 is 5 × 2 × 2 × 2 = 40,
The greatest common factor of 20 and 8 is 2 × 2 = 4

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