21355281

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{4813}}^1$

素因数の和:4865

約数の個数: 24

約数和(自身を含む): 33794280

約数和(自身を除く): 12438999

約数列:

[1, 3, 9, 17, 29, 51, 87, 153, 261, 493, 1479, 4437, 4813, 14439, 43317, 81821, 139577, 245463, 418731, 736389, 1256193, 2372809, 7118427, 21355281]

約数ペア:

[(1, 21355281), (3, 7118427), (9, 2372809), (17, 1256193), (29, 736389), (51, 418731), (87, 245463), (153, 139577), (261, 81821), (493, 43317), (1479, 14439), (4437, 4813)]