LCM( 13, 2196 ) = 28548
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 13, b = 2196 and GCD(13, 2196) = 1.
$$ \text{LCM} (13, 2196) = \frac{ 13 \cdot 2196 }{ \text{GCD}(13,2196)} = \frac{ 28548 }{ 1 } = 28548 $$