21821157

素因数分解:

$3^6\times {\mathrm{37}}^1\times {\mathrm{809}}^1$

素因数の和:864

約数の個数: 28

約数和(自身を含む): 33642540

約数和(自身を除く): 11821383

約数列:

[1, 3, 9, 27, 37, 81, 111, 243, 333, 729, 809, 999, 2427, 2997, 7281, 8991, 21843, 26973, 29933, 65529, 89799, 196587, 269397, 589761, 808191, 2424573, 7273719, 21821157]

約数ペア:

[(1, 21821157), (3, 7273719), (9, 2424573), (27, 808191), (37, 589761), (81, 269397), (111, 196587), (243, 89799), (333, 65529), (729, 29933), (809, 26973), (999, 21843), (2427, 8991), (2997, 7281)]