20989808

素因数分解:

$2^4\times 7^1\times {\mathrm{187409}}^1$

素因数の和:187424

約数の個数: 20

約数和(自身を含む): 46477680

約数和(自身を除く): 25487872

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 187409, 374818, 749636, 1311863, 1499272, 2623726, 2998544, 5247452, 10494904, 20989808]

約数ペア:

[(1, 20989808), (2, 10494904), (4, 5247452), (7, 2998544), (8, 2623726), (14, 1499272), (16, 1311863), (28, 749636), (56, 374818), (112, 187409)]