19885743

素因数分解:

$3^4\times {\mathrm{383}}^1\times {\mathrm{641}}^1$

素因数の和:1036

約数の個数: 20

約数和(自身を含む): 29829888

約数和(自身を除く): 9944145

約数列:

[1, 3, 9, 27, 81, 383, 641, 1149, 1923, 3447, 5769, 10341, 17307, 31023, 51921, 245503, 736509, 2209527, 6628581, 19885743]

約数ペア:

[(1, 19885743), (3, 6628581), (9, 2209527), (27, 736509), (81, 245503), (383, 51921), (641, 31023), (1149, 17307), (1923, 10341), (3447, 5769)]