How many positive integers not exceeding 48 are relatively prime to 48?
Note
This is Euler's totient value φ(48). Removing multiples of its prime factors gives φ(48) = 16.
How many positive integers not exceeding 48 are relatively prime to 48?
This is Euler's totient value φ(48). Removing multiples of its prime factors gives φ(48) = 16.