21891051

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{26729}}^1$

素因数の和:26755

約数の個数: 24

約数和(自身を含む): 38918880

約数和(自身を除く): 17027829

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 26729, 80187, 187103, 240561, 347477, 561309, 1042431, 1683927, 2432339, 3127293, 7297017, 21891051]

約数ペア:

[(1, 21891051), (3, 7297017), (7, 3127293), (9, 2432339), (13, 1683927), (21, 1042431), (39, 561309), (63, 347477), (91, 240561), (117, 187103), (273, 80187), (819, 26729)]