18268780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{22279}}^1$

素因数の和:22329

約数の個数: 24

約数和(自身を含む): 39301920

約数和(自身を除く): 21033140

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 22279, 44558, 89116, 111395, 222790, 445580, 913439, 1826878, 3653756, 4567195, 9134390, 18268780]

約数ペア:

[(1, 18268780), (2, 9134390), (4, 4567195), (5, 3653756), (10, 1826878), (20, 913439), (41, 445580), (82, 222790), (164, 111395), (205, 89116), (410, 44558), (820, 22279)]