OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
J. A. Sellers, A Note On Infinitely Many Odd Nonunitary Abundant Numbers
MATHEMATICA
f[p_, e_] := (p^(e + 1) - 1)/(p - 1); nuabQ[n_] := Times @@ (f @@@ FactorInteger[n]) - Times @@ (1 + Power @@@ FactorInteger[n]) > n; Select[Range[3, 10^6, 2], nuabQ] (* Amiram Eldar, May 12 2019 *)
PROG
(PARI) { usigma(n)=local(s=1, fac, i); fac=factor(n); for(i=1, matsize(fac)[1], s=s*(1+fac[i, 1]^fac[i, 2])); return(s); } nusigma(n)=sigma(n)-usigma(n); forstep(n=1, 2^24, 2, if(nusigma(n)>n, print1(n", ")))
CROSSREFS
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, Jun 16 2004
EXTENSIONS
Corrected and extended by Jason Earls, Jun 18 2004
STATUS
approved