21115107

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1399}}^1$

素因数の和:1464

約数の個数: 32

約数和(自身を含む): 34496000

約数和(自身を除く): 13380893

約数列:

[1, 3, 9, 13, 27, 39, 43, 117, 129, 351, 387, 559, 1161, 1399, 1677, 4197, 5031, 12591, 15093, 18187, 37773, 54561, 60157, 163683, 180471, 491049, 541413, 782041, 1624239, 2346123, 7038369, 21115107]

約数ペア:

[(1, 21115107), (3, 7038369), (9, 2346123), (13, 1624239), (27, 782041), (39, 541413), (43, 491049), (117, 180471), (129, 163683), (351, 60157), (387, 54561), (559, 37773), (1161, 18187), (1399, 15093), (1677, 12591), (4197, 5031)]