How many positive integers not exceeding 36 are relatively prime to 36?
Note
This is Euler's totient value φ(36). Removing multiples of its prime factors gives φ(36) = 12.
How many positive integers not exceeding 36 are relatively prime to 36?
This is Euler's totient value φ(36). Removing multiples of its prime factors gives φ(36) = 12.