7821279

素因数分解:

$3^4\times {\mathrm{223}}^1\times {\mathrm{433}}^1$

素因数の和:668

約数の個数: 20

約数和(自身を含む): 11763136

約数和(自身を除く): 3941857

約数列:

[1, 3, 9, 27, 81, 223, 433, 669, 1299, 2007, 3897, 6021, 11691, 18063, 35073, 96559, 289677, 869031, 2607093, 7821279]

約数ペア:

[(1, 7821279), (3, 2607093), (9, 869031), (27, 289677), (81, 96559), (223, 35073), (433, 18063), (669, 11691), (1299, 6021), (2007, 3897)]