21115683

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{4759}}^1$

素因数の和:4811

約数の個数: 24

約数和(自身を含む): 33415200

約数和(自身を除く): 12299517

約数列:

[1, 3, 9, 17, 29, 51, 87, 153, 261, 493, 1479, 4437, 4759, 14277, 42831, 80903, 138011, 242709, 414033, 728127, 1242099, 2346187, 7038561, 21115683]

約数ペア:

[(1, 21115683), (3, 7038561), (9, 2346187), (17, 1242099), (29, 728127), (51, 414033), (87, 242709), (153, 138011), (261, 80903), (493, 42831), (1479, 14277), (4437, 4759)]