21108890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191899}}^1$

素因数の和:191917

約数の個数: 16

約数和(自身を含む): 41450400

約数和(自身を除く): 20341510

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 191899, 383798, 959495, 1918990, 2110889, 4221778, 10554445, 21108890]

約数ペア:

[(1, 21108890), (2, 10554445), (5, 4221778), (10, 2110889), (11, 1918990), (22, 959495), (55, 383798), (110, 191899)]