20784005

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{19889}}^1$

素因数の和:19924

約数の個数: 16

約数和(自身を含む): 28641600

約数和(自身を除く): 7857595

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 19889, 99445, 218779, 377891, 1093895, 1889455, 4156801, 20784005]

約数ペア:

[(1, 20784005), (5, 4156801), (11, 1889455), (19, 1093895), (55, 377891), (95, 218779), (209, 99445), (1045, 19889)]