21800680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49547}}^1$

素因数の和:49569

約数の個数: 32

約数和(自身を含む): 53511840

約数和(自身を除く): 31711160

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49547, 99094, 198188, 247735, 396376, 495470, 545017, 990940, 1090034, 1981880, 2180068, 2725085, 4360136, 5450170, 10900340, 21800680]

約数ペア:

[(1, 21800680), (2, 10900340), (4, 5450170), (5, 4360136), (8, 2725085), (10, 2180068), (11, 1981880), (20, 1090034), (22, 990940), (40, 545017), (44, 495470), (55, 396376), (88, 247735), (110, 198188), (220, 99094), (440, 49547)]