81640260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{251}}^1$

素因数の和:418

約数の個数: 144

約数和(自身を含む): 269680320

約数和(自身を除く): 188040060

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 139, 156, 180, 195, 234, 251, 260, 278, 390, 417, 468, 502, 556, 585, 695, 753, 780, 834, 1004, 1170, 1251, 1255, 1390, 1506, 1668, 1807, 2085, 2259, 2340, 2502, 2510, 2780, 3012, 3263, 3614, 3765, 4170, 4518, 5004, 5020, 5421, 6255, 6526, 7228, 7530, 8340, 9035, 9036, 9789, 10842, 11295, 12510, 13052, 15060, 16263, 16315, 18070, 19578, 21684, 22590, 25020, 27105, 29367, 32526, 32630, 34889, 36140, 39156, 45180, 48945, 54210, 58734, 65052, 65260, 69778, 81315, 97890, 104667, 108420, 117468, 139556, 146835, 162630, 174445, 195780, 209334, 293670, 314001, 325260, 348890, 418668, 453557, 523335, 587340, 628002, 697780, 907114, 1046670, 1256004, 1360671, 1570005, 1814228, 2093340, 2267785, 2721342, 3140010, 4082013, 4535570, 5442684, 6280020, 6803355, 8164026, 9071140, 13606710, 16328052, 20410065, 27213420, 40820130, 81640260]

約数ペア:

[(1, 81640260), (2, 40820130), (3, 27213420), (4, 20410065), (5, 16328052), (6, 13606710), (9, 9071140), (10, 8164026), (12, 6803355), (13, 6280020), (15, 5442684), (18, 4535570), (20, 4082013), (26, 3140010), (30, 2721342), (36, 2267785), (39, 2093340), (45, 1814228), (52, 1570005), (60, 1360671), (65, 1256004), (78, 1046670), (90, 907114), (117, 697780), (130, 628002), (139, 587340), (156, 523335), (180, 453557), (195, 418668), (234, 348890), (251, 325260), (260, 314001), (278, 293670), (390, 209334), (417, 195780), (468, 174445), (502, 162630), (556, 146835), (585, 139556), (695, 117468), (753, 108420), (780, 104667), (834, 97890), (1004, 81315), (1170, 69778), (1251, 65260), (1255, 65052), (1390, 58734), (1506, 54210), (1668, 48945), (1807, 45180), (2085, 39156), (2259, 36140), (2340, 34889), (2502, 32630), (2510, 32526), (2780, 29367), (3012, 27105), (3263, 25020), (3614, 22590), (3765, 21684), (4170, 19578), (4518, 18070), (5004, 16315), (5020, 16263), (5421, 15060), (6255, 13052), (6526, 12510), (7228, 11295), (7530, 10842), (8340, 9789), (9035, 9036)]