21191540

素因数分解:

$2^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{3407}}^1$

素因数の和:3727

約数の個数: 24

約数和(自身を含む): 44658432

約数和(自身を除く): 23466892

約数列:

[1, 2, 4, 5, 10, 20, 311, 622, 1244, 1555, 3110, 3407, 6220, 6814, 13628, 17035, 34070, 68140, 1059577, 2119154, 4238308, 5297885, 10595770, 21191540]

約数ペア:

[(1, 21191540), (2, 10595770), (4, 5297885), (5, 4238308), (10, 2119154), (20, 1059577), (311, 68140), (622, 34070), (1244, 17035), (1555, 13628), (3110, 6814), (3407, 6220)]