21557690

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{27997}}^1$

素因数の和:28022

約数の個数: 32

約数和(自身を含む): 48380544

約数和(自身を除く): 26822854

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770, 27997, 55994, 139985, 195979, 279970, 307967, 391958, 615934, 979895, 1539835, 1959790, 2155769, 3079670, 4311538, 10778845, 21557690]

約数ペア:

[(1, 21557690), (2, 10778845), (5, 4311538), (7, 3079670), (10, 2155769), (11, 1959790), (14, 1539835), (22, 979895), (35, 615934), (55, 391958), (70, 307967), (77, 279970), (110, 195979), (154, 139985), (385, 55994), (770, 27997)]