18788880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{647}}^1$

素因数の和:685

約数の個数: 120

約数和(自身を含む): 64120896

約数和(自身を除く): 45332016

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 33, 40, 44, 48, 55, 60, 66, 80, 88, 110, 120, 121, 132, 165, 176, 220, 240, 242, 264, 330, 363, 440, 484, 528, 605, 647, 660, 726, 880, 968, 1210, 1294, 1320, 1452, 1815, 1936, 1941, 2420, 2588, 2640, 2904, 3235, 3630, 3882, 4840, 5176, 5808, 6470, 7117, 7260, 7764, 9680, 9705, 10352, 12940, 14234, 14520, 15528, 19410, 21351, 25880, 28468, 29040, 31056, 35585, 38820, 42702, 51760, 56936, 71170, 77640, 78287, 85404, 106755, 113872, 142340, 155280, 156574, 170808, 213510, 234861, 284680, 313148, 341616, 391435, 427020, 469722, 569360, 626296, 782870, 854040, 939444, 1174305, 1252592, 1565740, 1708080, 1878888, 2348610, 3131480, 3757776, 4697220, 6262960, 9394440, 18788880]

約数ペア:

[(1, 18788880), (2, 9394440), (3, 6262960), (4, 4697220), (5, 3757776), (6, 3131480), (8, 2348610), (10, 1878888), (11, 1708080), (12, 1565740), (15, 1252592), (16, 1174305), (20, 939444), (22, 854040), (24, 782870), (30, 626296), (33, 569360), (40, 469722), (44, 427020), (48, 391435), (55, 341616), (60, 313148), (66, 284680), (80, 234861), (88, 213510), (110, 170808), (120, 156574), (121, 155280), (132, 142340), (165, 113872), (176, 106755), (220, 85404), (240, 78287), (242, 77640), (264, 71170), (330, 56936), (363, 51760), (440, 42702), (484, 38820), (528, 35585), (605, 31056), (647, 29040), (660, 28468), (726, 25880), (880, 21351), (968, 19410), (1210, 15528), (1294, 14520), (1320, 14234), (1452, 12940), (1815, 10352), (1936, 9705), (1941, 9680), (2420, 7764), (2588, 7260), (2640, 7117), (2904, 6470), (3235, 5808), (3630, 5176), (3882, 4840)]