A basic implementation of Euler and Carmichael Totient function.
Euler: 1 == 1 | Carmichael: 1
Euler: 2 == 1 | Carmichael: 1
Euler: 3 == 2 | Carmichael: 2
Euler: 4 == 2 | Carmichael: 2
Euler: 5 == 4 | Carmichael: 4
Euler: 6 == 2 | Carmichael: 2
Euler: 7 == 6 | Carmichael: 6
Euler: 8 == 4 | Carmichael: 2
Euler: 9 == 6 | Carmichael: 6
Euler: 10 == 4 | Carmichael: 4
Euler: 11 == 10 | Carmichael: 10
Euler: 12 == 4 | Carmichael: 2