20403721821

素因数分解:

$3^1\times 7^1\times {\mathrm{709}}^1\times {\mathrm{1370389}}^1$

素因数の和:1371108

約数の個数: 16

約数和(自身を含む): 31135260800

約数和(自身を除く): 10731538979

約数列:

[1, 3, 7, 21, 709, 2127, 4963, 14889, 1370389, 4111167, 9592723, 28778169, 971605801, 2914817403, 6801240607, 20403721821]

約数ペア:

[(1, 20403721821), (3, 6801240607), (7, 2914817403), (21, 971605801), (709, 28778169), (2127, 9592723), (4963, 4111167), (14889, 1370389)]