21330673

素因数分解:

$7^1\times {\mathrm{13}}^3\times {\mathrm{19}}^1\times {\mathrm{73}}^1$

素因数の和:138

約数の個数: 32

約数和(自身を含む): 28179200

約数和(自身を除く): 6848527

約数列:

[1, 7, 13, 19, 73, 91, 133, 169, 247, 511, 949, 1183, 1387, 1729, 2197, 3211, 6643, 9709, 12337, 15379, 18031, 22477, 41743, 86359, 126217, 160381, 234403, 292201, 1122667, 1640821, 3047239, 21330673]

約数ペア:

[(1, 21330673), (7, 3047239), (13, 1640821), (19, 1122667), (73, 292201), (91, 234403), (133, 160381), (169, 126217), (247, 86359), (511, 41743), (949, 22477), (1183, 18031), (1387, 15379), (1729, 12337), (2197, 9709), (3211, 6643)]