21904169

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{1049}}^1$

素因数の和:1232

約数の個数: 16

約数和(自身を含む): 26544000

約数和(自身を除く): 4639831

約数列:

[1, 7, 19, 133, 157, 1049, 1099, 2983, 7343, 19931, 20881, 139517, 164693, 1152851, 3129167, 21904169]

約数ペア:

[(1, 21904169), (7, 3129167), (19, 1152851), (133, 164693), (157, 139517), (1049, 20881), (1099, 19931), (2983, 7343)]