OFFSET
1,1
COMMENTS
Like the abundancy index (ratio A000203(n)/n), and ratio A003961(n)/n, the ratio A003973(n)/sigma(n) is also multiplicative and > 1 for all n > 1. Thus if the number has a proper divisor that is in this sequence, then the number itself is also. See A337543 for those terms included here, but which have no proper divisor in this sequence. - Antti Karttunen, Aug 31 2020
All terms are in A246282 because A341528(n) < A341529(n) for all n > 1. - Antti Karttunen, Feb 22 2021
LINKS
PROG
CROSSREFS
Subsequence of A246282.
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 27 2020
STATUS
approved