19889540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{90407}}^1$

素因数の和:90427

約数の個数: 24

約数和(自身を含む): 45565632

約数和(自身を除く): 25676092

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 90407, 180814, 361628, 452035, 904070, 994477, 1808140, 1988954, 3977908, 4972385, 9944770, 19889540]

約数ペア:

[(1, 19889540), (2, 9944770), (4, 4972385), (5, 3977908), (10, 1988954), (11, 1808140), (20, 994477), (22, 904070), (44, 452035), (55, 361628), (110, 180814), (220, 90407)]