21111507

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{1721}}^1$

素因数の和:1803

約数の個数: 24

約数和(自身を含む): 32235840

約数和(自身を除く): 11124333

約数列:

[1, 3, 9, 29, 47, 87, 141, 261, 423, 1363, 1721, 4089, 5163, 12267, 15489, 49909, 80887, 149727, 242661, 449181, 727983, 2345723, 7037169, 21111507]

約数ペア:

[(1, 21111507), (3, 7037169), (9, 2345723), (29, 727983), (47, 449181), (87, 242661), (141, 149727), (261, 80887), (423, 49909), (1363, 15489), (1721, 12267), (4089, 5163)]