# This b-file was computed by Antti Karttunen, 2021-05-29 # in GP/PARI CALCULATOR Version 2.9.4 (released) amd64 running linux (x86-64/GMP-6.1.2 kernel) 64-bit version, compiled: Dec 19 2017, gcc version 7.3.0 (Ubuntu 7.3.0-1ubuntu1), threading engine: pthread # with the following program: # # A048250(n) = factorback(apply(p -> p+1,factor(n)[,1])); # A344753(n) = sumdiv(n,d,(d<n)*(d+(issquarefree(n/d) * d))); # isA344755(n) = { my(t=A344753(n),u=A048250(n)); ((0==(t%u))&&(0==(n%(t/u)))); }; # k=0; for(n=2,2^31,if(!(n%(2^26)),print1("(",n,")")); if(isA344755(n),k++; write("b344755.txt", k, " ", n))); 1 6 2 28 3 150 4 496 5 528 6 1980 7 4560 8 8128 9 8736 10 11400 11 19872 12 20664 13 75840 14 82080 15 253080 16 254880 17 741744 18 1627290 19 5130300 20 5607360 21 7529760 22 19645440 23 20718720 24 33550336 25 35092512 26 45643392 27 45995040 28 56424960 29 86944320 30 169910136 31 174013920 32 180442080 33 196378992 34 242040960 35 304577280 36 314511360 37 326611440 38 451344960 39 487547424 40 696784032 41 816528600 42 864765720 43 908953920 44 937902240 45 1092120576 46 1173747456 47 1350594972 48 1424902752 49 1492624224 50 2005724160