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A066410 Maximal sum of divisors of any n-digit number. 1
15, 252, 3048, 34560, 403200, 4390848, 45732192, 487710720, 5079674880, 52124083200, 542890252800, 5618427494400, 58517854617600, 591272607744000, 6026281863275520, 60762014342184960, 623846047297536000, 6394202229664972800, 64417520701204070400, 652677739551129600000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
a(1) = 15 since sigma(8) is 15 and that is the record for 1-digit numbers.
PROG
(PARI): maxsigdig(m, n)= { local(d, a, k, b); for(d=m, n, a=0; for(k=10^d, 10^(d+1)-1, b=sigma(k); if(b>a, a=b)); print1(a, ", "))} maxsigdig(0, 7)
CROSSREFS
Sequence in context: A331493 A093147 A218192 * A370317 A116508 A055659
KEYWORD
base,nonn
AUTHOR
Jason Earls, Dec 25 2001
EXTENSIONS
More terms from Vladeta Jovovic, Dec 26 2001
STATUS
approved

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Last modified April 21 13:26 EDT 2024. Contains 371870 sequences. (Running on oeis4.)