3 - простое число.
6 = 2*3
НОК(3, 6) = 2*3 = 6
28 = 2*2*7
9 = 3*3
НОК(28, 9) = 2*2*3*3*7 = 252
15 = 3*5
20 = 2*2*5
НОК(15, 20) = 2*2*3*5 = 60
3 - простое число.
6 = 2*3
НОК(3, 6) = 2*3 = 6
28 = 2*2*7
9 = 3*3
НОК(28, 9) = 2*2*3*3*7 = 252
15 = 3*5
20 = 2*2*5
НОК(15, 20) = 2*2*3*5 = 60