21857924

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{45161}}^1$

素因数の和:45187

約数の個数: 18

約数和(自身を含む): 42045822

約数和(自身を除く): 20187898

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 45161, 90322, 180644, 496771, 993542, 1987084, 5464481, 10928962, 21857924]

約数ペア:

[(1, 21857924), (2, 10928962), (4, 5464481), (11, 1987084), (22, 993542), (44, 496771), (121, 180644), (242, 90322), (484, 45161)]