21073239

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{523}}^1$

素因数の和:588

約数の個数: 36

約数和(自身を含む): 34427848

約数和(自身を除く): 13354609

約数列:

[1, 3, 9, 11, 33, 37, 99, 111, 121, 333, 363, 407, 523, 1089, 1221, 1569, 3663, 4477, 4707, 5753, 13431, 17259, 19351, 40293, 51777, 58053, 63283, 174159, 189849, 212861, 569547, 638583, 1915749, 2341471, 7024413, 21073239]

約数ペア:

[(1, 21073239), (3, 7024413), (9, 2341471), (11, 1915749), (33, 638583), (37, 569547), (99, 212861), (111, 189849), (121, 174159), (333, 63283), (363, 58053), (407, 51777), (523, 40293), (1089, 19351), (1221, 17259), (1569, 13431), (3663, 5753), (4477, 4707)]