cototient
The cototient function.
Syntax
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cototient(n)-
nis an integer
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Description
If n is a positive integer, then totient(n) is the number of positive integers less than or equal to n that are relatively prime to n.
The cototient of n, cototient(n), is defined as n − totient(n). This is the number of positive integers less than or equal to n that have at least one prime factor in common with n.
Examples
cototient(19871226)
13671162