Composition of Arithmetical functions with generalization of perfect and related numbers
In this paper we have studied the deficient and abundent numbers connected with the composition of , , , and arithmetical functions, where is Euler totient, is unitary totient, is sum of divisor, is unitary sum of divisor and is Dedekind’s function. In 1988, J. Sandor conjectured that , for all , all odd and proved that this conjecture is equivalent to , we have studied this equivalent conjecture. Further, a necessary and sufficient conditions of primitivity for unitary r-deficient...