18668923

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{367}}^1$

素因数の和:443

約数の個数: 24

約数和(自身を含む): 23705088

約数和(自身を除く): 5036165

約数列:

[1, 7, 13, 43, 91, 169, 301, 367, 559, 1183, 2569, 3913, 4771, 7267, 15781, 33397, 50869, 62023, 110467, 205153, 434161, 1436071, 2666989, 18668923]

約数ペア:

[(1, 18668923), (7, 2666989), (13, 1436071), (43, 434161), (91, 205153), (169, 110467), (301, 62023), (367, 50869), (559, 33397), (1183, 15781), (2569, 7267), (3913, 4771)]