19965080

素因数分解:

$2^3\times 5^1\times {\mathrm{499127}}^1$

素因数の和:499138

約数の個数: 16

約数和(自身を含む): 44921520

約数和(自身を除く): 24956440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499127, 998254, 1996508, 2495635, 3993016, 4991270, 9982540, 19965080]

約数ペア:

[(1, 19965080), (2, 9982540), (4, 4991270), (5, 3993016), (8, 2495635), (10, 1996508), (20, 998254), (40, 499127)]