20908797

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:210

約数の個数: 64

約数和(自身を含む): 37632000

約数和(自身を除く): 16723203

約数列:

[1, 3, 7, 13, 19, 21, 29, 39, 57, 87, 91, 133, 139, 203, 247, 273, 377, 399, 417, 551, 609, 741, 973, 1131, 1653, 1729, 1807, 2639, 2641, 2919, 3857, 4031, 5187, 5421, 7163, 7917, 7923, 11571, 12093, 12649, 18487, 21489, 28217, 34333, 37947, 50141, 52403, 55461, 76589, 84651, 102999, 150423, 157209, 229767, 240331, 366821, 536123, 720993, 995657, 1100463, 1608369, 2986971, 6969599, 20908797]

約数ペア:

[(1, 20908797), (3, 6969599), (7, 2986971), (13, 1608369), (19, 1100463), (21, 995657), (29, 720993), (39, 536123), (57, 366821), (87, 240331), (91, 229767), (133, 157209), (139, 150423), (203, 102999), (247, 84651), (273, 76589), (377, 55461), (399, 52403), (417, 50141), (551, 37947), (609, 34333), (741, 28217), (973, 21489), (1131, 18487), (1653, 12649), (1729, 12093), (1807, 11571), (2639, 7923), (2641, 7917), (2919, 7163), (3857, 5421), (4031, 5187)]