261661521

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{11279}}^1$

素因数の和:11349

約数の個数: 32

約数和(自身を含む): 411494400

約数和(自身を除く): 149832879

約数列:

[1, 3, 11, 19, 33, 37, 57, 111, 209, 407, 627, 703, 1221, 2109, 7733, 11279, 23199, 33837, 124069, 214301, 372207, 417323, 642903, 1251969, 2357311, 4590553, 7071933, 7929137, 13771659, 23787411, 87220507, 261661521]

約数ペア:

[(1, 261661521), (3, 87220507), (11, 23787411), (19, 13771659), (33, 7929137), (37, 7071933), (57, 4590553), (111, 2357311), (209, 1251969), (407, 642903), (627, 417323), (703, 372207), (1221, 214301), (2109, 124069), (7733, 33837), (11279, 23199)]