20397811

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1489}}^1$

素因数の和:1618

約数の個数: 16

約数和(自身を含む): 24793600

約数和(自身を除く): 4395789

約数列:

[1, 7, 19, 103, 133, 721, 1489, 1957, 10423, 13699, 28291, 153367, 198037, 1073569, 2913973, 20397811]

約数ペア:

[(1, 20397811), (7, 2913973), (19, 1073569), (103, 198037), (133, 153367), (721, 28291), (1489, 13699), (1957, 10423)]