211391999

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{607}}^1$

素因数の和:759

約数の個数: 32

約数和(自身を含む): 269660160

約数和(自身を除く): 58268161

約数列:

[1, 7, 13, 43, 89, 91, 301, 559, 607, 623, 1157, 3827, 3913, 4249, 7891, 8099, 26101, 26789, 49751, 54023, 55237, 182707, 339313, 348257, 378161, 702299, 2322989, 2375191, 4916093, 16260923, 30198857, 211391999]

約数ペア:

[(1, 211391999), (7, 30198857), (13, 16260923), (43, 4916093), (89, 2375191), (91, 2322989), (301, 702299), (559, 378161), (607, 348257), (623, 339313), (1157, 182707), (3827, 55237), (3913, 54023), (4249, 49751), (7891, 26789), (8099, 26101)]