21686275

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1259}}^1$

素因数の和:1335

約数の個数: 24

約数和(自身を含む): 29529360

約数和(自身を除く): 7843085

約数列:

[1, 5, 13, 25, 53, 65, 265, 325, 689, 1259, 1325, 3445, 6295, 16367, 17225, 31475, 66727, 81835, 333635, 409175, 867451, 1668175, 4337255, 21686275]

約数ペア:

[(1, 21686275), (5, 4337255), (13, 1668175), (25, 867451), (53, 409175), (65, 333635), (265, 81835), (325, 66727), (689, 31475), (1259, 17225), (1325, 16367), (3445, 6295)]