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A075656
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n + product of prime factors of n.
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1
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1, 4, 6, 6, 10, 12, 14, 10, 12, 20, 22, 18, 26, 28, 30, 18, 34, 24, 38, 30, 42, 44, 46, 30, 30, 52, 30, 42, 58, 60, 62, 34, 66, 68, 70, 42, 74, 76, 78, 50, 82, 84, 86, 66, 60, 92, 94, 54, 56, 60, 102, 78, 106, 60, 110, 70, 114, 116, 118, 90, 122, 124, 84, 66, 130, 132
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OFFSET
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1,2
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COMMENTS
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Prime factors taken without multiplicity. - Harvey P. Dale, Feb 27 2021
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LINKS
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FORMULA
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EXAMPLE
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6 + product of prime factors of 6 = 6 + 2 * 3 = 12, so a(6) = 12.
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MATHEMATICA
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Flatten[Append[{1}, Table[n + Apply[Times, Transpose[FactorInteger[n]][[1]]], {n, 2, 100}]]]
Join[{1}, Table[n+Times@@FactorInteger[n][[All, 1]], {n, 2, 70}]] (* Harvey P. Dale, Feb 27 2021 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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