LCM( 17, 64 ) = 1088
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 17, b = 64 and GCD(17, 64) = 1.
$$ \text{LCM} (17, 64) = \frac{ 17 \cdot 64 }{ \text{GCD}(17,64)} = \frac{ 1088 }{ 1 } = 1088 $$