MathCastle
Number TheorySuperchallengeDiophantine Equations

Diophantine Equations · Superchallenge problem

How many ordered triples of positive integers (a,b,c)(a, b, c) satisfy (1+1a)(1+1b)(1+1c)=2\left(1 + \dfrac1a\right)\left(1 + \dfrac1b\right)\left(1 + \dfrac1c\right) = 2? (Order matters.)