21597381

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1663}}^1$

素因数の和:1722

約数の個数: 32

約数和(自身を含む): 35409920

約数和(自身を除く): 13812539

約数列:

[1, 3, 9, 13, 27, 37, 39, 111, 117, 333, 351, 481, 999, 1443, 1663, 4329, 4989, 12987, 14967, 21619, 44901, 61531, 64857, 184593, 194571, 553779, 583713, 799903, 1661337, 2399709, 7199127, 21597381]

約数ペア:

[(1, 21597381), (3, 7199127), (9, 2399709), (13, 1661337), (27, 799903), (37, 583713), (39, 553779), (111, 194571), (117, 184593), (333, 64857), (351, 61531), (481, 44901), (999, 21619), (1443, 14967), (1663, 12987), (4329, 4989)]