81599980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{4817}}^1$

素因数の和:4855

約数の個数: 72

約数和(自身を含む): 215306784

約数和(自身を除く): 133706804

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1210, 1540, 1694, 2420, 3388, 4235, 4817, 8470, 9634, 16940, 19268, 24085, 33719, 48170, 52987, 67438, 96340, 105974, 134876, 168595, 211948, 264935, 337190, 370909, 529870, 582857, 674380, 741818, 1059740, 1165714, 1483636, 1854545, 2331428, 2914285, 3709090, 4079999, 5828570, 7418180, 8159998, 11657140, 16319996, 20399995, 40799990, 81599980]

約数ペア:

[(1, 81599980), (2, 40799990), (4, 20399995), (5, 16319996), (7, 11657140), (10, 8159998), (11, 7418180), (14, 5828570), (20, 4079999), (22, 3709090), (28, 2914285), (35, 2331428), (44, 1854545), (55, 1483636), (70, 1165714), (77, 1059740), (110, 741818), (121, 674380), (140, 582857), (154, 529870), (220, 370909), (242, 337190), (308, 264935), (385, 211948), (484, 168595), (605, 134876), (770, 105974), (847, 96340), (1210, 67438), (1540, 52987), (1694, 48170), (2420, 33719), (3388, 24085), (4235, 19268), (4817, 16940), (8470, 9634)]