   ;33,2,336;144483A;2482AAABABAABA      48B6;12;...

Bài 2:

   

;3,2614448aba      

6;12;18;24;30;36;42

a 6 12 18 24 30 36 42

b 21 18 15 12 9 6 3

(a,b) 3 6 3 12 3 6 3

[a,b] 42 36 90 24 90 36 42

(a,b) + [a,b] 129 114 273 84 114 114 129

Vậy a = 12; b = 18 hoặc a = 36 ; b = 6