20565799821

素因数分解:

$3^2\times 7^1\times {\mathrm{1021}}^1\times {\mathrm{319727}}^1$

素因数の和:320761

約数の個数: 24

約数和(自身を含む): 33983249664

約数和(自身を除く): 13417449843

約数列:

[1, 3, 7, 9, 21, 63, 1021, 3063, 7147, 9189, 21441, 64323, 319727, 959181, 2238089, 2877543, 6714267, 20142801, 326441267, 979323801, 2285088869, 2937971403, 6855266607, 20565799821]

約数ペア:

[(1, 20565799821), (3, 6855266607), (7, 2937971403), (9, 2285088869), (21, 979323801), (63, 326441267), (1021, 20142801), (3063, 6714267), (7147, 2877543), (9189, 2238089), (21441, 959181), (64323, 319727)]