21481281

素因数分解:

$3^4\times {\mathrm{163}}^1\times {\mathrm{1627}}^1$

素因数の和:1802

約数の個数: 20

約数和(自身を含む): 32306032

約数和(自身を除く): 10824751

約数列:

[1, 3, 9, 27, 81, 163, 489, 1467, 1627, 4401, 4881, 13203, 14643, 43929, 131787, 265201, 795603, 2386809, 7160427, 21481281]

約数ペア:

[(1, 21481281), (3, 7160427), (9, 2386809), (27, 795603), (81, 265201), (163, 131787), (489, 43929), (1467, 14643), (1627, 13203), (4401, 4881)]