\(60=2^2\cdot3\cdot5\) có \(\left(2+1\right)\left(1+1\right)\left(1+1\right)=12\left(ước\right)\)
\(72=2^3\cdot3^2\) có \(\left(3+1\right)\left(2+1\right)=12\left(ước\right)\)
\(25=5^2\) có \(5+1=3\left(ước\right)\)
\(102=2\cdot3\cdot17\) có \(\left(1+1\right)\left(1+1\right)\left(1+1\right)=8\left(ước\right)\)
\(123=3\cdot41\) có \(\left(1+1\right)\left(1+1\right)=4\left(ước\right)\)