20989031

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{677}}^1$

素因数の和:830

約数の個数: 16

約数和(自身を含む): 24820224

約数和(自身を除く): 3831193

約数列:

[1, 7, 43, 103, 301, 677, 721, 4429, 4739, 29111, 31003, 69731, 203777, 488117, 2998433, 20989031]

約数ペア:

[(1, 20989031), (7, 2998433), (43, 488117), (103, 203777), (301, 69731), (677, 31003), (721, 29111), (4429, 4739)]