Problem

Source: Bosnia and Herzegovina Junior Balkan Mathematical Olympiad TST 2015

Tags: number theory, solve, triplets



Find all triplets of positive integers $a$, $b$ and $c$ such that $a \geq b \geq c$ and $\left(1+\frac{1}{a}\right)\left(1+\frac{1}{b}\right)\left(1+\frac{1}{c}\right)=2$