81479860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{337}}^1$

素因数の和:521

約数の個数: 96

約数和(自身を含む): 215324928

約数和(自身を除く): 133845068

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 157, 220, 308, 314, 337, 385, 628, 674, 770, 785, 1099, 1348, 1540, 1570, 1685, 1727, 2198, 2359, 3140, 3370, 3454, 3707, 4396, 4718, 5495, 6740, 6908, 7414, 8635, 9436, 10990, 11795, 12089, 14828, 17270, 18535, 21980, 23590, 24178, 25949, 34540, 37070, 47180, 48356, 51898, 52909, 60445, 74140, 103796, 105818, 120890, 129745, 211636, 241780, 259490, 264545, 370363, 518980, 529090, 581999, 740726, 1058180, 1163998, 1481452, 1851815, 2327996, 2909995, 3703630, 4073993, 5819990, 7407260, 8147986, 11639980, 16295972, 20369965, 40739930, 81479860]

約数ペア:

[(1, 81479860), (2, 40739930), (4, 20369965), (5, 16295972), (7, 11639980), (10, 8147986), (11, 7407260), (14, 5819990), (20, 4073993), (22, 3703630), (28, 2909995), (35, 2327996), (44, 1851815), (55, 1481452), (70, 1163998), (77, 1058180), (110, 740726), (140, 581999), (154, 529090), (157, 518980), (220, 370363), (308, 264545), (314, 259490), (337, 241780), (385, 211636), (628, 129745), (674, 120890), (770, 105818), (785, 103796), (1099, 74140), (1348, 60445), (1540, 52909), (1570, 51898), (1685, 48356), (1727, 47180), (2198, 37070), (2359, 34540), (3140, 25949), (3370, 24178), (3454, 23590), (3707, 21980), (4396, 18535), (4718, 17270), (5495, 14828), (6740, 12089), (6908, 11795), (7414, 10990), (8635, 9436)]