19997080

素因数分解:

$2^3\times 5^1\times {\mathrm{499927}}^1$

素因数の和:499938

約数の個数: 16

約数和(自身を含む): 44993520

約数和(自身を除く): 24996440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499927, 999854, 1999708, 2499635, 3999416, 4999270, 9998540, 19997080]

約数ペア:

[(1, 19997080), (2, 9998540), (4, 4999270), (5, 3999416), (8, 2499635), (10, 1999708), (20, 999854), (40, 499927)]