l totient of 8
Enter n for totient

Calculate φ(8)

This is known as the totient

Calculate factors for 8

Factors for 8 are 1,2,4,8

Factors < 8 with 1 as common factor

#Factor ListMatching Factors Totient List?
111Y
21,21,2N
31,31Y
41,2,41,2,4N
51,51Y
61,2,3,61,2N
71,71Y

Build totient list

1,3,5,7

Final Answer


φ(8) = 4