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A182463
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Integers m arising from A068977.
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2
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1, 2, 5, 7, 9, 11, 13, 15, 15, 19, 21, 25, 25, 24, 31, 33, 39, 35, 43, 45, 49, 40, 55, 61, 63, 55, 69, 73, 75, 65, 56, 81, 85, 60, 75, 91, 99, 103, 105, 64, 109, 111, 115, 105, 88, 129, 133, 115, 139, 141, 84, 125, 104, 151, 153, 100, 159, 135
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OFFSET
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1,2
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COMMENTS
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1 = 1 , 2 = 1 + 2/tau(2) , 5 = 1 + 2/tau(2) + 3/tau(3) + 6/tau(6) , 7 = 1 + 2/tau(2) + 5/tau(5) + 10/tau(10) ,....
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LINKS
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MATHEMATICA
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Select[Table[Sum[k/DivisorSigma[0, k], {k, Divisors[n]}], {n, 1, 1000}], IntegerQ[#] &] (* Vaclav Kotesovec, Mar 22 2019 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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