1981400

素因数分解:

$2^3\times 5^2\times {\mathrm{9907}}^1$

素因数の和:9923

約数の個数: 24

約数和(自身を含む): 4607220

約数和(自身を除く): 2625820

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 9907, 19814, 39628, 49535, 79256, 99070, 198140, 247675, 396280, 495350, 990700, 1981400]

約数ペア:

[(1, 1981400), (2, 990700), (4, 495350), (5, 396280), (8, 247675), (10, 198140), (20, 99070), (25, 79256), (40, 49535), (50, 39628), (100, 19814), (200, 9907)]