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A069546 Sum_{d|n} sigma(n*d). 0
1, 10, 17, 53, 37, 170, 65, 236, 174, 370, 145, 901, 197, 650, 629, 987, 325, 1740, 401, 1961, 1105, 1450, 577, 4012, 968, 1970, 1618, 3445, 901, 6290, 1025, 4026, 2465, 3250, 2405, 9222, 1445, 4010, 3349, 8732, 1765, 11050, 1937, 7685, 6438, 5770 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..46.

FORMULA

Multiplicative with a(p^e) = (p^(e+1)*(p^(e+1)-1)-(p-1)*(e+1))/(p-1)^2.

MATHEMATICA

Table[ Apply[ Plus, DivisorSigma[1, n*Divisors[n]]], {n, 1, 50}]

CROSSREFS

Cf. A061391, A062354.

Sequence in context: A164285 A268183 A293690 * A065018 A039336 A043159

Adjacent sequences:  A069543 A069544 A069545 * A069547 A069548 A069549

KEYWORD

mult,easy,nonn

AUTHOR

Vladeta Jovovic, Apr 17 2002

EXTENSIONS

Edited and extended by Robert G. Wilson v, Apr 22 2002

STATUS

approved

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Last modified August 18 14:05 EDT 2019. Contains 326100 sequences. (Running on oeis4.)