19817360

素因数分解:

$2^4\times 5^1\times {\mathrm{247717}}^1$

素因数の和:247730

約数の個数: 20

約数和(自身を含む): 46075548

約数和(自身を除く): 26258188

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247717, 495434, 990868, 1238585, 1981736, 2477170, 3963472, 4954340, 9908680, 19817360]

約数ペア:

[(1, 19817360), (2, 9908680), (4, 4954340), (5, 3963472), (8, 2477170), (10, 1981736), (16, 1238585), (20, 990868), (40, 495434), (80, 247717)]