@article{1983-canfield
,author={E. Rodney Canfield and Paul Erd\H os and Carl Pomerance}
,ISSN={0022--314X}
,journal={Journal of Number Theory}
,MR={85j:11012}
,pages={1--28}
,title={{On a problem of Oppenheim concerning ``factorisatio numerorum''}}
,volume={17}
,year={1983}
}