21231485

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{5437}}^1$

素因数の和:5524

約数の個数: 16

約数和(自身を含む): 28190592

約数和(自身を除く): 6959107

約数列:

[1, 5, 11, 55, 71, 355, 781, 3905, 5437, 27185, 59807, 299035, 386027, 1930135, 4246297, 21231485]

約数ペア:

[(1, 21231485), (5, 4246297), (11, 1930135), (55, 386027), (71, 299035), (355, 59807), (781, 27185), (3905, 5437)]