21161690

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17489}}^1$

素因数の和:17518

約数の個数: 24

約数和(自身を含む): 41871060

約数和(自身を除く): 20709370

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210, 17489, 34978, 87445, 174890, 192379, 384758, 961895, 1923790, 2116169, 4232338, 10580845, 21161690]

約数ペア:

[(1, 21161690), (2, 10580845), (5, 4232338), (10, 2116169), (11, 1923790), (22, 961895), (55, 384758), (110, 192379), (121, 174890), (242, 87445), (605, 34978), (1210, 17489)]