21195837

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20129}}^1$

素因数の和:20154

約数の個数: 20

約数和(自身を含む): 34100220

約数和(自身を除く): 12904383

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20129, 60387, 181161, 261677, 543483, 785031, 1630449, 2355093, 7065279, 21195837]

約数ペア:

[(1, 21195837), (3, 7065279), (9, 2355093), (13, 1630449), (27, 785031), (39, 543483), (81, 261677), (117, 181161), (351, 60387), (1053, 20129)]