9809891

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:195

約数の個数: 32

約数和(自身を含む): 13009920

約数和(自身を除く): 3200029

約数列:

[1, 7, 13, 23, 43, 91, 109, 161, 299, 301, 559, 763, 989, 1417, 2093, 2507, 3913, 4687, 6923, 9919, 12857, 17549, 32591, 32809, 60931, 89999, 107801, 228137, 426517, 754607, 1401413, 9809891]

約数ペア:

[(1, 9809891), (7, 1401413), (13, 754607), (23, 426517), (43, 228137), (91, 107801), (109, 89999), (161, 60931), (299, 32809), (301, 32591), (559, 17549), (763, 12857), (989, 9919), (1417, 6923), (2093, 4687), (2507, 3913)]