21118911

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{5981}}^1$

素因数の和:6102

約数の個数: 16

約数和(自身を含む): 31010688

約数和(自身を除く): 9891777

約数列:

[1, 3, 11, 33, 107, 321, 1177, 3531, 5981, 17943, 65791, 197373, 639967, 1919901, 7039637, 21118911]

約数ペア:

[(1, 21118911), (3, 7039637), (11, 1919901), (33, 639967), (107, 197373), (321, 65791), (1177, 17943), (3531, 5981)]