21528311

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{1031}}^1$

素因数の和:1214

約数の個数: 16

約数和(自身を含む): 26088960

約数和(自身を除く): 4560649

約数列:

[1, 7, 19, 133, 157, 1031, 1099, 2983, 7217, 19589, 20881, 137123, 161867, 1133069, 3075473, 21528311]

約数ペア:

[(1, 21528311), (7, 3075473), (19, 1133069), (133, 161867), (157, 137123), (1031, 20881), (1099, 19589), (2983, 7217)]