20808801

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13681}}^1$

素因数の和:13713

約数の個数: 18

約数和(自身を含む): 32549478

約数和(自身を除く): 11740677

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13681, 41043, 123129, 177853, 533559, 1600677, 2312089, 6936267, 20808801]

約数ペア:

[(1, 20808801), (3, 6936267), (9, 2312089), (13, 1600677), (39, 533559), (117, 177853), (169, 123129), (507, 41043), (1521, 13681)]