20997966

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{4481}}^1$

素因数の和:4568

約数の個数: 32

約数和(自身を含む): 46469376

約数和(自身を除く): 25471410

約数列:

[1, 2, 3, 6, 11, 22, 33, 66, 71, 142, 213, 426, 781, 1562, 2343, 4481, 4686, 8962, 13443, 26886, 49291, 98582, 147873, 295746, 318151, 636302, 954453, 1908906, 3499661, 6999322, 10498983, 20997966]

約数ペア:

[(1, 20997966), (2, 10498983), (3, 6999322), (6, 3499661), (11, 1908906), (22, 954453), (33, 636302), (66, 318151), (71, 295746), (142, 147873), (213, 98582), (426, 49291), (781, 26886), (1562, 13443), (2343, 8962), (4481, 4686)]