21405879

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{463}}^1\times {\mathrm{467}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 33875712

約数和(自身を除く): 12469833

約数列:

[1, 3, 9, 11, 33, 99, 463, 467, 1389, 1401, 4167, 4203, 5093, 5137, 15279, 15411, 45837, 46233, 216221, 648663, 1945989, 2378431, 7135293, 21405879]

約数ペア:

[(1, 21405879), (3, 7135293), (9, 2378431), (11, 1945989), (33, 648663), (99, 216221), (463, 46233), (467, 45837), (1389, 15411), (1401, 15279), (4167, 5137), (4203, 5093)]