OFFSET
1,12
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..10080
FORMULA
PROG
(PARI) A323069(n) = sumdiv(n, d, my(t=(d-numdiv(d))); ((t>1)&&!(n%t)));
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 05 2019
STATUS
approved