81438420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2731}}^1$

素因数の和:2821

約数の個数: 96

約数和(自身を含む): 264370176

約数和(自身を除く): 182931756

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 71, 84, 105, 140, 142, 210, 213, 284, 355, 420, 426, 497, 710, 852, 994, 1065, 1420, 1491, 1988, 2130, 2485, 2731, 2982, 4260, 4970, 5462, 5964, 7455, 8193, 9940, 10924, 13655, 14910, 16386, 19117, 27310, 29820, 32772, 38234, 40965, 54620, 57351, 76468, 81930, 95585, 114702, 163860, 191170, 193901, 229404, 286755, 382340, 387802, 573510, 581703, 775604, 969505, 1147020, 1163406, 1357307, 1939010, 2326812, 2714614, 2908515, 3878020, 4071921, 5429228, 5817030, 6786535, 8143842, 11634060, 13573070, 16287684, 20359605, 27146140, 40719210, 81438420]

約数ペア:

[(1, 81438420), (2, 40719210), (3, 27146140), (4, 20359605), (5, 16287684), (6, 13573070), (7, 11634060), (10, 8143842), (12, 6786535), (14, 5817030), (15, 5429228), (20, 4071921), (21, 3878020), (28, 2908515), (30, 2714614), (35, 2326812), (42, 1939010), (60, 1357307), (70, 1163406), (71, 1147020), (84, 969505), (105, 775604), (140, 581703), (142, 573510), (210, 387802), (213, 382340), (284, 286755), (355, 229404), (420, 193901), (426, 191170), (497, 163860), (710, 114702), (852, 95585), (994, 81930), (1065, 76468), (1420, 57351), (1491, 54620), (1988, 40965), (2130, 38234), (2485, 32772), (2731, 29820), (2982, 27310), (4260, 19117), (4970, 16386), (5462, 14910), (5964, 13655), (7455, 10924), (8193, 9940)]