90808991

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1009}}^1$

素因数の和:1095

約数の個数: 32

約数和(自身を含む): 119454720

約数和(自身を除く): 28645729

約数列:

[1, 7, 13, 23, 43, 91, 161, 299, 301, 559, 989, 1009, 2093, 3913, 6923, 7063, 12857, 13117, 23207, 43387, 89999, 91819, 162449, 301691, 303709, 564031, 997901, 2111837, 3948217, 6985307, 12972713, 90808991]

約数ペア:

[(1, 90808991), (7, 12972713), (13, 6985307), (23, 3948217), (43, 2111837), (91, 997901), (161, 564031), (299, 303709), (301, 301691), (559, 162449), (989, 91819), (1009, 89999), (2093, 43387), (3913, 23207), (6923, 13117), (7063, 12857)]