20508290

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{997}}^1$

素因数の和:1043

約数の個数: 48

約数和(自身を含む): 43005816

約数和(自身を除く): 22497526

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 55, 85, 110, 121, 170, 187, 242, 374, 605, 935, 997, 1210, 1870, 1994, 2057, 4114, 4985, 9970, 10285, 10967, 16949, 20570, 21934, 33898, 54835, 84745, 109670, 120637, 169490, 186439, 241274, 372878, 603185, 932195, 1206370, 1864390, 2050829, 4101658, 10254145, 20508290]

約数ペア:

[(1, 20508290), (2, 10254145), (5, 4101658), (10, 2050829), (11, 1864390), (17, 1206370), (22, 932195), (34, 603185), (55, 372878), (85, 241274), (110, 186439), (121, 169490), (170, 120637), (187, 109670), (242, 84745), (374, 54835), (605, 33898), (935, 21934), (997, 20570), (1210, 16949), (1870, 10967), (1994, 10285), (2057, 9970), (4114, 4985)]