81009280

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:378

約数の個数: 128

約数和(自身を含む): 217676160

約数和(自身を除く): 136666880

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 37, 40, 44, 55, 64, 74, 80, 88, 110, 128, 148, 160, 176, 185, 220, 296, 311, 320, 352, 370, 407, 440, 592, 622, 640, 704, 740, 814, 880, 1184, 1244, 1408, 1480, 1555, 1628, 1760, 2035, 2368, 2488, 2960, 3110, 3256, 3421, 3520, 4070, 4736, 4976, 5920, 6220, 6512, 6842, 7040, 8140, 9952, 11507, 11840, 12440, 13024, 13684, 16280, 17105, 19904, 23014, 23680, 24880, 26048, 27368, 32560, 34210, 39808, 46028, 49760, 52096, 54736, 57535, 65120, 68420, 92056, 99520, 109472, 115070, 126577, 130240, 136840, 184112, 199040, 218944, 230140, 253154, 260480, 273680, 368224, 437888, 460280, 506308, 547360, 632885, 736448, 920560, 1012616, 1094720, 1265770, 1472896, 1841120, 2025232, 2189440, 2531540, 3682240, 4050464, 5063080, 7364480, 8100928, 10126160, 16201856, 20252320, 40504640, 81009280]

約数ペア:

[(1, 81009280), (2, 40504640), (4, 20252320), (5, 16201856), (8, 10126160), (10, 8100928), (11, 7364480), (16, 5063080), (20, 4050464), (22, 3682240), (32, 2531540), (37, 2189440), (40, 2025232), (44, 1841120), (55, 1472896), (64, 1265770), (74, 1094720), (80, 1012616), (88, 920560), (110, 736448), (128, 632885), (148, 547360), (160, 506308), (176, 460280), (185, 437888), (220, 368224), (296, 273680), (311, 260480), (320, 253154), (352, 230140), (370, 218944), (407, 199040), (440, 184112), (592, 136840), (622, 130240), (640, 126577), (704, 115070), (740, 109472), (814, 99520), (880, 92056), (1184, 68420), (1244, 65120), (1408, 57535), (1480, 54736), (1555, 52096), (1628, 49760), (1760, 46028), (2035, 39808), (2368, 34210), (2488, 32560), (2960, 27368), (3110, 26048), (3256, 24880), (3421, 23680), (3520, 23014), (4070, 19904), (4736, 17105), (4976, 16280), (5920, 13684), (6220, 13024), (6512, 12440), (6842, 11840), (7040, 11507), (8140, 9952)]