20999169

素因数分解:

$3^4\times {\mathrm{131}}^1\times {\mathrm{1979}}^1$

素因数の和:2122

約数の個数: 20

約数和(自身を含む): 31624560

約数和(自身を除く): 10625391

約数列:

[1, 3, 9, 27, 81, 131, 393, 1179, 1979, 3537, 5937, 10611, 17811, 53433, 160299, 259249, 777747, 2333241, 6999723, 20999169]

約数ペア:

[(1, 20999169), (3, 6999723), (9, 2333241), (27, 777747), (81, 259249), (131, 160299), (393, 53433), (1179, 17811), (1979, 10611), (3537, 5937)]