EntityQ649322· pop 9· linked from 7 articlesZnám's problemSign in to savethe problem of finding sets of integers in which each is a proper divisor of one plus the product of the othersConnectionsareaEntityprime numberEntityintegerEntitynumber theoryEntitytopologyEntitysetEntity18Entitydigital object identifierEntitysequenceEntity96EntityparityEntitydivisorEntityJSTOREntityconjectureEntityOn-Line Encyclopedia of Integer SequencesEntityrecurrence relationEntityMathWorldEntityunit fractionEntitymathematical singularityEntityEric W. WeissteinEntityCategoriesEgyptian fractionsInteger sequencesMathematical problemsNumber theory