21905403

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{5153}}^1$

素因数の和:5278

約数の個数: 16

約数和(自身を含む): 31748640

約数和(自身を除く): 9843237

約数列:

[1, 3, 13, 39, 109, 327, 1417, 4251, 5153, 15459, 66989, 200967, 561677, 1685031, 7301801, 21905403]

約数ペア:

[(1, 21905403), (3, 7301801), (13, 1685031), (39, 561677), (109, 200967), (327, 66989), (1417, 15459), (4251, 5153)]