20409895

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{19531}}^1$

素因数の和:19566

約数の個数: 16

約数和(自身を含む): 28126080

約数和(自身を除く): 7716185

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 19531, 97655, 214841, 371089, 1074205, 1855445, 4081979, 20409895]

約数ペア:

[(1, 20409895), (5, 4081979), (11, 1855445), (19, 1074205), (55, 371089), (95, 214841), (209, 97655), (1045, 19531)]