21828471

素因数分解:

$3^1\times 7^2\times {\mathrm{163}}^1\times {\mathrm{911}}^1$

素因数の和:1091

約数の個数: 24

約数和(自身を含む): 34101504

約数和(自身を除く): 12273033

約数列:

[1, 3, 7, 21, 49, 147, 163, 489, 911, 1141, 2733, 3423, 6377, 7987, 19131, 23961, 44639, 133917, 148493, 445479, 1039451, 3118353, 7276157, 21828471]

約数ペア:

[(1, 21828471), (3, 7276157), (7, 3118353), (21, 1039451), (49, 445479), (147, 148493), (163, 133917), (489, 44639), (911, 23961), (1141, 19131), (2733, 7987), (3423, 6377)]