НОД(a, b) = 2min(2, 1) × 3min(1, 2) = 21 × 31 = 2 × 3 = 6
НОК(a, b) = 2max(2, 1) × 3max(1, 2) × 5max(0, 1) × 7max(1, 0) = 22 × 32 × 51 × 71 = 4 × 9 × 5 × 7 = 1260