80921800

素因数分解:

$2^3\times 5^2\times {\mathrm{401}}^1\times {\mathrm{1009}}^1$

素因数の和:1426

約数の個数: 48

約数和(自身を含む): 188799300

約数和(自身を除く): 107877500

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 401, 802, 1009, 1604, 2005, 2018, 3208, 4010, 4036, 5045, 8020, 8072, 10025, 10090, 16040, 20050, 20180, 25225, 40100, 40360, 50450, 80200, 100900, 201800, 404609, 809218, 1618436, 2023045, 3236872, 4046090, 8092180, 10115225, 16184360, 20230450, 40460900, 80921800]

約数ペア:

[(1, 80921800), (2, 40460900), (4, 20230450), (5, 16184360), (8, 10115225), (10, 8092180), (20, 4046090), (25, 3236872), (40, 2023045), (50, 1618436), (100, 809218), (200, 404609), (401, 201800), (802, 100900), (1009, 80200), (1604, 50450), (2005, 40360), (2018, 40100), (3208, 25225), (4010, 20180), (4036, 20050), (5045, 16040), (8020, 10090), (8072, 10025)]