81661360

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1307}}^1$

素因数の和:1402

約数の個数: 80

約数和(自身を含む): 210200832

約数和(自身を除く): 128539472

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 71, 80, 88, 110, 142, 176, 220, 284, 355, 440, 568, 710, 781, 880, 1136, 1307, 1420, 1562, 2614, 2840, 3124, 3905, 5228, 5680, 6248, 6535, 7810, 10456, 12496, 13070, 14377, 15620, 20912, 26140, 28754, 31240, 52280, 57508, 62480, 71885, 92797, 104560, 115016, 143770, 185594, 230032, 287540, 371188, 463985, 575080, 742376, 927970, 1020767, 1150160, 1484752, 1855940, 2041534, 3711880, 4083068, 5103835, 7423760, 8166136, 10207670, 16332272, 20415340, 40830680, 81661360]

約数ペア:

[(1, 81661360), (2, 40830680), (4, 20415340), (5, 16332272), (8, 10207670), (10, 8166136), (11, 7423760), (16, 5103835), (20, 4083068), (22, 3711880), (40, 2041534), (44, 1855940), (55, 1484752), (71, 1150160), (80, 1020767), (88, 927970), (110, 742376), (142, 575080), (176, 463985), (220, 371188), (284, 287540), (355, 230032), (440, 185594), (568, 143770), (710, 115016), (781, 104560), (880, 92797), (1136, 71885), (1307, 62480), (1420, 57508), (1562, 52280), (2614, 31240), (2840, 28754), (3124, 26140), (3905, 20912), (5228, 15620), (5680, 14377), (6248, 13070), (6535, 12496), (7810, 10456)]