21109880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47977}}^1$

素因数の和:47999

約数の個数: 32

約数和(自身を含む): 51816240

約数和(自身を除く): 30706360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47977, 95954, 191908, 239885, 383816, 479770, 527747, 959540, 1055494, 1919080, 2110988, 2638735, 4221976, 5277470, 10554940, 21109880]

約数ペア:

[(1, 21109880), (2, 10554940), (4, 5277470), (5, 4221976), (8, 2638735), (10, 2110988), (11, 1919080), (20, 1055494), (22, 959540), (40, 527747), (44, 479770), (55, 383816), (88, 239885), (110, 191908), (220, 95954), (440, 47977)]