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Search: id:A034676
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| A034676 |
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Sum of squares of unitary divisors of n. |
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+0
2
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| 1, 5, 10, 17, 26, 50, 50, 65, 82, 130, 122, 170, 170, 250, 260, 257, 290, 410, 362, 442, 500, 610, 530, 650, 626, 850, 730, 850, 842, 1300, 962, 1025, 1220, 1450, 1300, 1394, 1370, 1810, 1700, 1690, 1682, 2500, 1850, 2074, 2132, 2650, 2210, 2570, 2402, 3130
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Also sum of unitary divisors of n^2. - Vladeta Jovovic (vladeta(AT)eunet.rs), Nov 13 2001
If b(n,k)=sum of k-th powers of unitary divisors of n then b(n,k) is multiplicative with b(p^e,k)=p^(k*e)+1. - Vladeta Jovovic (vladeta(AT)eunet.rs), Nov 13 2001
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LINKS
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Eric Weisstein's World of Mathematics, Unitary Divisor Function
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FORMULA
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Multiplicative with a(p^e)=p^(2*e)+1.
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CROSSREFS
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Cf. A034444, A034448, A034677, A034678-A034682.
Sequence in context: A105705 A061409 A098749 this_sequence A076598 A080341 A086653
Adjacent sequences: A034673 A034674 A034675 this_sequence A034677 A034678 A034679
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KEYWORD
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nonn,mult
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AUTHOR
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Erich Friedman (erich.friedman(AT)stetson.edu)
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