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 A339679 Larger of amicable pair (a, b) such that the sum of their number of divisors d(a) + d(b) sets a new record. 2
 284, 1210, 6368, 10856, 14595, 71145, 87633, 525915, 1438983, 1870245, 5120595, 6088905, 11791935, 14084763, 36939357, 207429525, 234587199, 662939925, 1337154465, 2450161791, 4024393191, 4785272037, 10162493523, 38437212933, 160412122575, 229777289469, 248806975131 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The terms are ordered according to their lesser counterparts (A339678). The terms were calculated using data from Chernykh's site. LINKS Amiram Eldar, Table of n, a(n) for n = 1..55 Sergei Chernykh, Amicable pairs list. MATHEMATICA s[n_] := DivisorSigma[1, n] - n; dm = 0; seq = {}; Do[m = s[n]; If[m > n && s[m] == n && (d = Plus @@ DivisorSigma[0, {n, m}]) > dm, dm = d; AppendTo[seq, m]], {n, 1 , 10^6}]; seq CROSSREFS Cf. A000005, A002025, A002046, A063990, A328043, A339678. Sequence in context: A234970 A260087 A002046 * A339683 A343917 A143191 Adjacent sequences: A339676 A339677 A339678 * A339680 A339681 A339682 KEYWORD nonn AUTHOR Amiram Eldar, Dec 12 2020 STATUS approved

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Last modified April 21 00:02 EDT 2024. Contains 371850 sequences. (Running on oeis4.)