21007778

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{1847}}^1$

素因数の和:1918

約数の個数: 24

約数和(自身を含む): 35392896

約数和(自身を除く): 14385118

約数列:

[1, 2, 11, 22, 47, 94, 121, 242, 517, 1034, 1847, 3694, 5687, 11374, 20317, 40634, 86809, 173618, 223487, 446974, 954899, 1909798, 10503889, 21007778]

約数ペア:

[(1, 21007778), (2, 10503889), (11, 1909798), (22, 954899), (47, 446974), (94, 223487), (121, 173618), (242, 86809), (517, 40634), (1034, 20317), (1847, 11374), (3694, 5687)]