20651309

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 26695680

約数和(自身を除く): 6044371

約数列:

[1, 7, 19, 23, 43, 133, 157, 161, 301, 437, 817, 989, 1099, 2983, 3059, 3611, 5719, 6751, 6923, 18791, 20881, 25277, 47257, 68609, 128269, 131537, 155273, 480263, 897883, 1086911, 2950187, 20651309]

約数ペア:

[(1, 20651309), (7, 2950187), (19, 1086911), (23, 897883), (43, 480263), (133, 155273), (157, 131537), (161, 128269), (301, 68609), (437, 47257), (817, 25277), (989, 20881), (1099, 18791), (2983, 6923), (3059, 6751), (3611, 5719)]