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 FactorInteger

 http://functions.wolfram.com/13.01.04.0001.01

 Input Form

 DomainAndRange[Function[n, FactorInteger[n]]] == Integers \[LongRightArrow] PowerSet[PowerSet[Integers, 2], m]

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["DomainAndRange", "[", RowBox[List["Function", "[", RowBox[List["n", ",", " ", RowBox[List["FactorInteger", "[", "n", "]"]]]], "]"]], "]"]], " ", "\[Equal]", "\[IndentingNewLine]", RowBox[List["Integers", "\[LongRightArrow]", RowBox[List["PowerSet", "[", RowBox[List[RowBox[List["PowerSet", "[", RowBox[List["Integers", ",", "2"]], "]"]], ",", " ", "m"]], "]"]]]]]]]]

 MathML Form

 n factors ( n ) TagBox["\[DoubleStruckCapitalN]", Function[Integers]] ( ) m Proportion LongRightArrow n factors n LongRightArrow CircleTimes m [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["DomainAndRange", "[", RowBox[List["Function", "[", RowBox[List["n_", ",", RowBox[List["FactorInteger", "[", "n_", "]"]]]], "]"]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List["Integers", "\[LongRightArrow]", RowBox[List["PowerSet", "[", RowBox[List[RowBox[List["PowerSet", "[", RowBox[List["Integers", ",", "2"]], "]"]], ",", "m"]], "]"]]]]]]]]

 Date Added to functions.wolfram.com (modification date)

 2001-10-29