396040

素因数分解:

$2^3\times 5^1\times {\mathrm{9901}}^1$

素因数の和:9912

約数の個数: 16

約数和(自身を含む): 891180

約数和(自身を除く): 495140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 9901, 19802, 39604, 49505, 79208, 99010, 198020, 396040]

約数ペア:

[(1, 396040), (2, 198020), (4, 99010), (5, 79208), (8, 49505), (10, 39604), (20, 19802), (40, 9901)]