21256660

素因数分解:

$2^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{4447}}^1$

素因数の和:4695

約数の個数: 24

約数和(自身を含む): 44835840

約数和(自身を除く): 23579180

約数列:

[1, 2, 4, 5, 10, 20, 239, 478, 956, 1195, 2390, 4447, 4780, 8894, 17788, 22235, 44470, 88940, 1062833, 2125666, 4251332, 5314165, 10628330, 21256660]

約数ペア:

[(1, 21256660), (2, 10628330), (4, 5314165), (5, 4251332), (10, 2125666), (20, 1062833), (239, 88940), (478, 44470), (956, 22235), (1195, 17788), (2390, 8894), (4447, 4780)]