21068385

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{8311}}^1$

素因数の和:8345

約数の個数: 24

約数和(自身を含む): 36506304

約数和(自身を除く): 15437919

約数列:

[1, 3, 5, 13, 15, 39, 65, 169, 195, 507, 845, 2535, 8311, 24933, 41555, 108043, 124665, 324129, 540215, 1404559, 1620645, 4213677, 7022795, 21068385]

約数ペア:

[(1, 21068385), (3, 7022795), (5, 4213677), (13, 1620645), (15, 1404559), (39, 540215), (65, 324129), (169, 124665), (195, 108043), (507, 41555), (845, 24933), (2535, 8311)]