18740561

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{2707}}^1$

素因数の和:2780

約数の個数: 16

約数和(自身を含む): 22877184

約数和(自身を除く): 4136623

約数列:

[1, 7, 23, 43, 161, 301, 989, 2707, 6923, 18949, 62261, 116401, 435827, 814807, 2677223, 18740561]

約数ペア:

[(1, 18740561), (7, 2677223), (23, 814807), (43, 435827), (161, 116401), (301, 62261), (989, 18949), (2707, 6923)]