How many positive integers not exceeding 45 are relatively prime to 45?
Note
This is Euler's totient value φ(45). Removing multiples of its prime factors gives φ(45) = 24.
How many positive integers not exceeding 45 are relatively prime to 45?
This is Euler's totient value φ(45). Removing multiples of its prime factors gives φ(45) = 24.