13

On the normal number of prime factors of p − 1 and some related problems concerning Euler’s φfunction, Quart
– P ERDÖS
 1935

155

Sieve method
– H Halberstam, H Richert
 1974

8

On the number of distinct values of Euler’s φfunction
– H Maier, C Pomerance
 1988

6

On some functions connected with φ(n
– S S Pillai
 1929

3

remarks on Euler’s φfunction and some related problems
– Some
 1945

3

On the values of Euler’s φfunction
– P Erdős, R R Hall
 1973

2

on number theory. II. Some problems on the σ function
– Remarks
 1959

2

On the number of common values of arithmetic functions φ and σ below x
– M Garaev
 2010

58

Old and New Problems and Results in Combinatorial Number Theory . . .
– P Erdős, R L. Graham
 1980

15

The distribution of totients
– Kevin Ford
 1998

2

On common values of φ(n) and σ(n
– K Ford, P Pollack
 2012

10

An asymptotic formula for the number of smooth values of a polynomial
– Greg Martin
 1999

10

Popular Values of Euler's Function
– C Pomerance

1

The distribution of totients, Paul Erdős memorial issue
– K Ford
 1998

1

On the distribution of the values of Euler’s function, Acta Arith. 47
– C Pomerance
 1986

7

The normal number of prime factors of a number n, Quart
– G H Hardy, S Ramanujan

74

On a problem of Oppenheim concerning “factorisatio numerorum
– E R Canfield, Paul Erdős, Carl Pomerance
 1983

3

An upper bound for odd perfect numbers
– Pace P. Nielsen

2

Probabilistic Number Theory I
– P D T A ELLIOT
 1979
