3915380170

Appears in sequences

• Numbers whose deficiency is 20: sigma(k) - 2*k = -20.at n=12A223607
• Numbers k such that sigma(k) == 0 (mod k-10).at n=20A274566
• Positive numbers n for which A000120(n) = k*A294898(n), with k < 0; numbers for which A326130(n) = sigma(n) - A005187(n).at n=13A326131
• Numbers k such that A005187(k) < sigma(k) <= 2k, where A005187(k) = 2k - {binary weight of k}.at n=15A326138