21993268

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{2617}}^1$

素因数の和:2823

約数の個数: 24

約数和(自身を含む): 42223104

約数和(自身を除く): 20229836

約数列:

[1, 2, 4, 11, 22, 44, 191, 382, 764, 2101, 2617, 4202, 5234, 8404, 10468, 28787, 57574, 115148, 499847, 999694, 1999388, 5498317, 10996634, 21993268]

約数ペア:

[(1, 21993268), (2, 10996634), (4, 5498317), (11, 1999388), (22, 999694), (44, 499847), (191, 115148), (382, 57574), (764, 28787), (2101, 10468), (2617, 8404), (4202, 5234)]