# This b-file was computed by Antti Karttunen, 2022-07-20 # 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: # # A003961(n) = { my(f = factor(n)); for (i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); factorback(f); }; # A342671(n) = gcd(sigma(n), A003961(n)); # memoA355828 = Map(); # A355828(n) = if(1==n,1,my(v); if(mapisdefined(memoA355828,n,&v), v, v = -sumdiv(n,d,if(d