21621520

素因数分解:

$2^4\times 5^1\times {\mathrm{270269}}^1$

素因数の和:270282

約数の個数: 20

約数和(自身を含む): 50270220

約数和(自身を除く): 28648700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270269, 540538, 1081076, 1351345, 2162152, 2702690, 4324304, 5405380, 10810760, 21621520]

約数ペア:

[(1, 21621520), (2, 10810760), (4, 5405380), (5, 4324304), (8, 2702690), (10, 2162152), (16, 1351345), (20, 1081076), (40, 540538), (80, 270269)]