81979920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{941}}^1$

素因数の和:982

約数の個数: 180

約数和(自身を含む): 302941548

約数和(自身を除く): 220961628

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 99, 110, 120, 121, 132, 144, 165, 176, 180, 198, 220, 240, 242, 264, 330, 360, 363, 396, 440, 484, 495, 528, 605, 660, 720, 726, 792, 880, 941, 968, 990, 1089, 1210, 1320, 1452, 1584, 1815, 1882, 1936, 1980, 2178, 2420, 2640, 2823, 2904, 3630, 3764, 3960, 4356, 4705, 4840, 5445, 5646, 5808, 7260, 7528, 7920, 8469, 8712, 9410, 9680, 10351, 10890, 11292, 14115, 14520, 15056, 16938, 17424, 18820, 20702, 21780, 22584, 28230, 29040, 31053, 33876, 37640, 41404, 42345, 43560, 45168, 51755, 56460, 62106, 67752, 75280, 82808, 84690, 87120, 93159, 103510, 112920, 113861, 124212, 135504, 155265, 165616, 169380, 186318, 207020, 225840, 227722, 248424, 310530, 338760, 341583, 372636, 414040, 455444, 465795, 496848, 569305, 621060, 677520, 683166, 745272, 828080, 910888, 931590, 1024749, 1138610, 1242120, 1366332, 1490544, 1707915, 1821776, 1863180, 2049498, 2277220, 2484240, 2732664, 3415830, 3726360, 4098996, 4554440, 5123745, 5465328, 6831660, 7452720, 8197992, 9108880, 10247490, 13663320, 16395984, 20494980, 27326640, 40989960, 81979920]

約数ペア:

[(1, 81979920), (2, 40989960), (3, 27326640), (4, 20494980), (5, 16395984), (6, 13663320), (8, 10247490), (9, 9108880), (10, 8197992), (11, 7452720), (12, 6831660), (15, 5465328), (16, 5123745), (18, 4554440), (20, 4098996), (22, 3726360), (24, 3415830), (30, 2732664), (33, 2484240), (36, 2277220), (40, 2049498), (44, 1863180), (45, 1821776), (48, 1707915), (55, 1490544), (60, 1366332), (66, 1242120), (72, 1138610), (80, 1024749), (88, 931590), (90, 910888), (99, 828080), (110, 745272), (120, 683166), (121, 677520), (132, 621060), (144, 569305), (165, 496848), (176, 465795), (180, 455444), (198, 414040), (220, 372636), (240, 341583), (242, 338760), (264, 310530), (330, 248424), (360, 227722), (363, 225840), (396, 207020), (440, 186318), (484, 169380), (495, 165616), (528, 155265), (605, 135504), (660, 124212), (720, 113861), (726, 112920), (792, 103510), (880, 93159), (941, 87120), (968, 84690), (990, 82808), (1089, 75280), (1210, 67752), (1320, 62106), (1452, 56460), (1584, 51755), (1815, 45168), (1882, 43560), (1936, 42345), (1980, 41404), (2178, 37640), (2420, 33876), (2640, 31053), (2823, 29040), (2904, 28230), (3630, 22584), (3764, 21780), (3960, 20702), (4356, 18820), (4705, 17424), (4840, 16938), (5445, 15056), (5646, 14520), (5808, 14115), (7260, 11292), (7528, 10890), (7920, 10351), (8469, 9680), (8712, 9410)]