20871903

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31481}}^1$

素因数の和:31514

約数の個数: 16

約数和(自身を含む): 31733856

約数和(自身を除く): 10861953

約数列:

[1, 3, 13, 17, 39, 51, 221, 663, 31481, 94443, 409253, 535177, 1227759, 1605531, 6957301, 20871903]

約数ペア:

[(1, 20871903), (3, 6957301), (13, 1605531), (17, 1227759), (39, 535177), (51, 409253), (221, 94443), (663, 31481)]