21320888

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{140269}}^1$

素因数の和:140294

約数の個数: 16

約数和(自身を含む): 42081000

約数和(自身を除く): 20760112

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 140269, 280538, 561076, 1122152, 2665111, 5330222, 10660444, 21320888]

約数ペア:

[(1, 21320888), (2, 10660444), (4, 5330222), (8, 2665111), (19, 1122152), (38, 561076), (76, 280538), (152, 140269)]