77721820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{401}}^1\times {\mathrm{881}}^1$

素因数の和:1302

約数の個数: 48

約数和(自身を含む): 178700256

約数和(自身を除く): 100978436

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 401, 802, 881, 1604, 1762, 2005, 3524, 4010, 4405, 4411, 8020, 8810, 8822, 9691, 17620, 17644, 19382, 22055, 38764, 44110, 48455, 88220, 96910, 193820, 353281, 706562, 1413124, 1766405, 3532810, 3886091, 7065620, 7772182, 15544364, 19430455, 38860910, 77721820]

約数ペア:

[(1, 77721820), (2, 38860910), (4, 19430455), (5, 15544364), (10, 7772182), (11, 7065620), (20, 3886091), (22, 3532810), (44, 1766405), (55, 1413124), (110, 706562), (220, 353281), (401, 193820), (802, 96910), (881, 88220), (1604, 48455), (1762, 44110), (2005, 38764), (3524, 22055), (4010, 19382), (4405, 17644), (4411, 17620), (8020, 9691), (8810, 8822)]