21123465

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128021}}^1$

素因数の和:128040

約数の個数: 16

約数和(自身を含む): 36870336

約数和(自身を除く): 15746871

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128021, 384063, 640105, 1408231, 1920315, 4224693, 7041155, 21123465]

約数ペア:

[(1, 21123465), (3, 7041155), (5, 4224693), (11, 1920315), (15, 1408231), (33, 640105), (55, 384063), (165, 128021)]