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A357461
Odd numbers whose number of deficient divisors is equal to their number of nondeficient divisors.
2
3010132125, 4502334375, 5065535475, 6456074625, 8813660625, 9881746875, 15395254875, 15452011575, 16874983125, 18699305625, 19814169375, 19909992375, 21380506875, 25366375125, 26643400875, 26746594875, 28943578125, 31562182575, 33074966925, 34315506225, 35300640375
OFFSET
1,1
COMMENTS
The odd terms of A357460.
If there are no odd perfect numbers, then this sequence is also the subsequence of the odd terms of A335543.
The first 100 terms are all divisible by 4725 = 3^3 * 5^2 * 7.
LINKS
PROG
(PARI) is(n) = n%2 && sumdiv(n, d, if(sigma(d, -1) < 2, 1, -1)) == 0;
CROSSREFS
Subsequence of A005101, A005231 and A357460.
Cf. A335543.
Sequence in context: A204338 A185889 A186093 * A336966 A333127 A225140
KEYWORD
nonn
AUTHOR
Amiram Eldar, Sep 29 2022
STATUS
approved