[a,b]=60,
a×b=120
[a,b]×(a,b)=a×b
(a,b)=120:60=2
(a,b)=2, a=2k, b=2n
2×2×kn=120
kn=120:4
kn=30
kn=30: kn∈(1,30), (2,15), (3,10), (5,6)
deci
a si b =(2×1, 2×30) deci a=2, b=60
a si b =(2×2, 15×2) deci a=4, b=30
a si b =(2×3, 10×2) deci a=6 b=20
a si b =(2×5, 2×6) deci a=10, b=12