20918864

素因数分解:

$2^4\times {\mathrm{389}}^1\times {\mathrm{3361}}^1$

素因数の和:3758

約数の個数: 20

約数和(自身を含む): 40646580

約数和(自身を除く): 19727716

約数列:

[1, 2, 4, 8, 16, 389, 778, 1556, 3112, 3361, 6224, 6722, 13444, 26888, 53776, 1307429, 2614858, 5229716, 10459432, 20918864]

約数ペア:

[(1, 20918864), (2, 10459432), (4, 5229716), (8, 2614858), (16, 1307429), (389, 53776), (778, 26888), (1556, 13444), (3112, 6722), (3361, 6224)]