20497940

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7481}}^1$

素因数の和:7627

約数の個数: 24

約数和(自身を含む): 43365672

約数和(自身を除く): 22867732

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7481, 14962, 29924, 37405, 74810, 149620, 1024897, 2049794, 4099588, 5124485, 10248970, 20497940]

約数ペア:

[(1, 20497940), (2, 10248970), (4, 5124485), (5, 4099588), (10, 2049794), (20, 1024897), (137, 149620), (274, 74810), (548, 37405), (685, 29924), (1370, 14962), (2740, 7481)]