20007647504

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{72161}}^1$

素因数の和:72256

約数の個数: 80

約数和(自身を含む): 44096177664

約数和(自身を除く): 24088530160

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 43, 52, 62, 86, 104, 124, 172, 208, 248, 344, 403, 496, 559, 688, 806, 1118, 1333, 1612, 2236, 2666, 3224, 4472, 5332, 6448, 8944, 10664, 17329, 21328, 34658, 69316, 72161, 138632, 144322, 277264, 288644, 577288, 938093, 1154576, 1876186, 2236991, 3102923, 3752372, 4473982, 6205846, 7504744, 8947964, 12411692, 15009488, 17895928, 24823384, 29080883, 35791856, 40337999, 49646768, 58161766, 80675998, 96190613, 116323532, 161351996, 192381226, 232647064, 322703992, 384762452, 465294128, 645407984, 769524904, 1250477969, 1539049808, 2500955938, 5001911876, 10003823752, 20007647504]

約数ペア:

[(1, 20007647504), (2, 10003823752), (4, 5001911876), (8, 2500955938), (13, 1539049808), (16, 1250477969), (26, 769524904), (31, 645407984), (43, 465294128), (52, 384762452), (62, 322703992), (86, 232647064), (104, 192381226), (124, 161351996), (172, 116323532), (208, 96190613), (248, 80675998), (344, 58161766), (403, 49646768), (496, 40337999), (559, 35791856), (688, 29080883), (806, 24823384), (1118, 17895928), (1333, 15009488), (1612, 12411692), (2236, 8947964), (2666, 7504744), (3224, 6205846), (4472, 4473982), (5332, 3752372), (6448, 3102923), (8944, 2236991), (10664, 1876186), (17329, 1154576), (21328, 938093), (34658, 577288), (69316, 288644), (72161, 277264), (138632, 144322)]