l totient of 10
Enter n for totient

Calculate φ(10)

This is known as the totient

Calculate factors for 10

Factors for 10 are 1,2,5,10

Factors < 10 with 1 as common factor

#Factor ListMatching Factors Totient List?
111Y
21,21,2N
31,31Y
41,2,41,2N
51,51,5N
61,2,3,61,2N
71,71Y
81,2,4,81,2N
91,3,91Y

Build totient list

1,3,7,9

Final Answer


φ(10) = 4