Composite positive integers with an average prime factor
Tom 129 / 2007
                    
                    
                        Acta Arithmetica 129 (2007), 197-201                    
                                        
                        MSC: Primary 11N37; Secondary 11N60, 11P32.                    
                                        
                        DOI: 10.4064/aa129-2-5                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            