20609771

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{229}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 27202560

約数和(自身を除く): 6592789

約数列:

[1, 7, 13, 23, 43, 91, 161, 229, 299, 301, 559, 989, 1603, 2093, 2977, 3913, 5267, 6923, 9847, 12857, 20839, 36869, 68471, 68929, 89999, 128011, 226481, 479297, 896077, 1585367, 2944253, 20609771]

約数ペア:

[(1, 20609771), (7, 2944253), (13, 1585367), (23, 896077), (43, 479297), (91, 226481), (161, 128011), (229, 89999), (299, 68929), (301, 68471), (559, 36869), (989, 20839), (1603, 12857), (2093, 9847), (2977, 6923), (3913, 5267)]