20881040

素因数分解:

$2^4\times 5^1\times {\mathrm{261013}}^1$

素因数の和:261026

約数の個数: 20

約数和(自身を含む): 48548604

約数和(自身を除く): 27667564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261013, 522026, 1044052, 1305065, 2088104, 2610130, 4176208, 5220260, 10440520, 20881040]

約数ペア:

[(1, 20881040), (2, 10440520), (4, 5220260), (5, 4176208), (8, 2610130), (10, 2088104), (16, 1305065), (20, 1044052), (40, 522026), (80, 261013)]