989989

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:97

約数の個数: 32

約数和(自身を含む): 1419264

約数和(自身を除く): 429275

約数列:

[1, 7, 11, 13, 23, 43, 77, 91, 143, 161, 253, 299, 301, 473, 559, 989, 1001, 1771, 2093, 3289, 3311, 3913, 6149, 6923, 10879, 12857, 23023, 43043, 76153, 89999, 141427, 989989]

約数ペア:

[(1, 989989), (7, 141427), (11, 89999), (13, 76153), (23, 43043), (43, 23023), (77, 12857), (91, 10879), (143, 6923), (161, 6149), (253, 3913), (299, 3311), (301, 3289), (473, 2093), (559, 1771), (989, 1001)]