21311667

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{547}}^1$

素因数の和:609

約数の個数: 40

約数和(自身を含む): 35275856

約数和(自身を除く): 13964189

約数列:

[1, 3, 9, 13, 27, 37, 39, 81, 111, 117, 333, 351, 481, 547, 999, 1053, 1443, 1641, 2997, 4329, 4923, 7111, 12987, 14769, 20239, 21333, 38961, 44307, 60717, 63999, 182151, 191997, 263107, 546453, 575991, 789321, 1639359, 2367963, 7103889, 21311667]

約数ペア:

[(1, 21311667), (3, 7103889), (9, 2367963), (13, 1639359), (27, 789321), (37, 575991), (39, 546453), (81, 263107), (111, 191997), (117, 182151), (333, 63999), (351, 60717), (481, 44307), (547, 38961), (999, 21333), (1053, 20239), (1443, 14769), (1641, 12987), (2997, 7111), (4329, 4923)]