21045940

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7681}}^1$

素因数の和:7827

約数の個数: 24

約数和(自身を含む): 44524872

約数和(自身を除く): 23478932

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7681, 15362, 30724, 38405, 76810, 153620, 1052297, 2104594, 4209188, 5261485, 10522970, 21045940]

約数ペア:

[(1, 21045940), (2, 10522970), (4, 5261485), (5, 4209188), (10, 2104594), (20, 1052297), (137, 153620), (274, 76810), (548, 38405), (685, 30724), (1370, 15362), (2740, 7681)]