19817973

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 36126720

約数和(自身を除く): 16308747

約数列:

[1, 3, 7, 9, 21, 23, 27, 47, 63, 69, 97, 141, 161, 189, 207, 291, 329, 423, 483, 621, 679, 873, 987, 1081, 1269, 1449, 2037, 2231, 2619, 2961, 3243, 4347, 4559, 6111, 6693, 7567, 8883, 9729, 13677, 15617, 18333, 20079, 22701, 29187, 31913, 41031, 46851, 60237, 68103, 95739, 104857, 123093, 140553, 204309, 287217, 314571, 421659, 733999, 861651, 943713, 2201997, 2831139, 6605991, 19817973]

約数ペア:

[(1, 19817973), (3, 6605991), (7, 2831139), (9, 2201997), (21, 943713), (23, 861651), (27, 733999), (47, 421659), (63, 314571), (69, 287217), (97, 204309), (141, 140553), (161, 123093), (189, 104857), (207, 95739), (291, 68103), (329, 60237), (423, 46851), (483, 41031), (621, 31913), (679, 29187), (873, 22701), (987, 20079), (1081, 18333), (1269, 15617), (1449, 13677), (2037, 9729), (2231, 8883), (2619, 7567), (2961, 6693), (3243, 6111), (4347, 4559)]