20651380

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7537}}^1$

素因数の和:7683

約数の個数: 24

約数和(自身を含む): 43690248

約数和(自身を除く): 23038868

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7537, 15074, 30148, 37685, 75370, 150740, 1032569, 2065138, 4130276, 5162845, 10325690, 20651380]

約数ペア:

[(1, 20651380), (2, 10325690), (4, 5162845), (5, 4130276), (10, 2065138), (20, 1032569), (137, 150740), (274, 75370), (548, 37685), (685, 30148), (1370, 15074), (2740, 7537)]