128780

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:193

約数の個数: 24

約数和(自身を含む): 278208

約数和(自身を除く): 149428

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 137, 188, 235, 274, 470, 548, 685, 940, 1370, 2740, 6439, 12878, 25756, 32195, 64390, 128780]

約数ペア:

[(1, 128780), (2, 64390), (4, 32195), (5, 25756), (10, 12878), (20, 6439), (47, 2740), (94, 1370), (137, 940), (188, 685), (235, 548), (274, 470)]