On the Equation τ(λ(n)) = ω(n) + k

摘要

For every positive integer n, the function r(n) counts the number of divisors of n, the function ω(n) counts the number of distinct prime divisors of n, and the Carmichael function λ(n) is the exponent of the multiplicative group of the invert-ible congruence classes modulo n.