21808780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155777}}^1$

素因数の和:155793

約数の個数: 24

約数和(自身を含む): 52341408

約数和(自身を除く): 30532628

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155777, 311554, 623108, 778885, 1090439, 1557770, 2180878, 3115540, 4361756, 5452195, 10904390, 21808780]

約数ペア:

[(1, 21808780), (2, 10904390), (4, 5452195), (5, 4361756), (7, 3115540), (10, 2180878), (14, 1557770), (20, 1090439), (28, 778885), (35, 623108), (70, 311554), (140, 155777)]