21280259

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{3037}}^1$

素因数の和:3075

約数の個数: 24

約数和(自身を含む): 29091888

約数和(自身を除く): 7811629

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 539, 637, 1001, 3037, 7007, 21259, 33407, 39481, 148813, 233849, 276367, 434291, 1636943, 1934569, 3040037, 21280259]

約数ペア:

[(1, 21280259), (7, 3040037), (11, 1934569), (13, 1636943), (49, 434291), (77, 276367), (91, 233849), (143, 148813), (539, 39481), (637, 33407), (1001, 21259), (3037, 7007)]