21680883

素因数分解:

$3^2\times 7^2\times {\mathrm{211}}^1\times {\mathrm{233}}^1$

素因数の和:464

約数の個数: 36

約数和(自身を含む): 36759528

約数和(自身を除く): 15078645

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 211, 233, 441, 633, 699, 1477, 1631, 1899, 2097, 4431, 4893, 10339, 11417, 13293, 14679, 31017, 34251, 49163, 93051, 102753, 147489, 344141, 442467, 1032423, 2408987, 3097269, 7226961, 21680883]

約数ペア:

[(1, 21680883), (3, 7226961), (7, 3097269), (9, 2408987), (21, 1032423), (49, 442467), (63, 344141), (147, 147489), (211, 102753), (233, 93051), (441, 49163), (633, 34251), (699, 31017), (1477, 14679), (1631, 13293), (1899, 11417), (2097, 10339), (4431, 4893)]