21451269

素因数分解:

$3^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{1999}}^1$

素因数の和:2089

約数の個数: 24

約数和(自身を含む): 33744000

約数和(自身を除く): 12292731

約数列:

[1, 3, 7, 21, 49, 73, 147, 219, 511, 1533, 1999, 3577, 5997, 10731, 13993, 41979, 97951, 145927, 293853, 437781, 1021489, 3064467, 7150423, 21451269]

約数ペア:

[(1, 21451269), (3, 7150423), (7, 3064467), (21, 1021489), (49, 437781), (73, 293853), (147, 145927), (219, 97951), (511, 41979), (1533, 13993), (1999, 10731), (3577, 5997)]