21128320

素因数分解:

$2^7\times 5^1\times {\mathrm{33013}}^1$

素因数の和:33032

約数の個数: 32

約数和(自身を含む): 50511420

約数和(自身を除く): 29383100

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33013, 66026, 132052, 165065, 264104, 330130, 528208, 660260, 1056416, 1320520, 2112832, 2641040, 4225664, 5282080, 10564160, 21128320]

約数ペア:

[(1, 21128320), (2, 10564160), (4, 5282080), (5, 4225664), (8, 2641040), (10, 2112832), (16, 1320520), (20, 1056416), (32, 660260), (40, 528208), (64, 330130), (80, 264104), (128, 165065), (160, 132052), (320, 66026), (640, 33013)]