How many positive integers not exceeding 54 are relatively prime to 54?
Note
This is Euler's totient value φ(54). Removing multiples of its prime factors gives φ(54) = 18.
How many positive integers not exceeding 54 are relatively prime to 54?
This is Euler's totient value φ(54). Removing multiples of its prime factors gives φ(54) = 18.