21116655

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1559}}^1$

素因数の和:1620

約数の個数: 48

約数和(自身を含む): 42831360

約数和(自身を除く): 21714705

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 63, 105, 129, 215, 301, 315, 387, 645, 903, 1505, 1559, 1935, 2709, 4515, 4677, 7795, 10913, 13545, 14031, 23385, 32739, 54565, 67037, 70155, 98217, 163695, 201111, 335185, 469259, 491085, 603333, 1005555, 1407777, 2346295, 3016665, 4223331, 7038885, 21116655]

約数ペア:

[(1, 21116655), (3, 7038885), (5, 4223331), (7, 3016665), (9, 2346295), (15, 1407777), (21, 1005555), (35, 603333), (43, 491085), (45, 469259), (63, 335185), (105, 201111), (129, 163695), (215, 98217), (301, 70155), (315, 67037), (387, 54565), (645, 32739), (903, 23385), (1505, 14031), (1559, 13545), (1935, 10913), (2709, 7795), (4515, 4677)]