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Search: id:A069192
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| A069192 |
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Sum of the reversals of the divisors of n. |
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+0
2
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| 1, 3, 4, 7, 6, 12, 8, 15, 13, 9, 12, 37, 32, 51, 60, 76, 72, 102, 92, 15, 23, 36, 33, 87, 58, 96, 85, 137, 93, 72, 14, 99, 48, 117, 66, 190, 74, 177, 128, 27
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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Pe, J. The Picture-Perfect Numbers
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EXAMPLE
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The divisors of 10 are 1,2,5,10, which reversed are 1,2,5,1, summing to 9. Therefore a(10) = 9.
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MATHEMATICA
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f[n_] := FromDigits[Reverse[IntegerDigits[n]]]; g[n_] := Apply[Plus, Map[f, Divisors[n]]]; Table[g[i], {i, 1, 40}]
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CROSSREFS
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Cf. A069250.
Sequence in context: A093811 A088000 A034690 this_sequence A076887 A140782 A097011
Adjacent sequences: A069189 A069190 A069191 this_sequence A069193 A069194 A069195
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KEYWORD
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base,nonn
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AUTHOR
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Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Apr 19 2002
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