21784259

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{3001}}^1$

素因数の和:3086

約数の個数: 16

約数和(自身を含む): 26801856

約数和(自身を除く): 5017597

約数列:

[1, 7, 17, 61, 119, 427, 1037, 3001, 7259, 21007, 51017, 183061, 357119, 1281427, 3112037, 21784259]

約数ペア:

[(1, 21784259), (7, 3112037), (17, 1281427), (61, 357119), (119, 183061), (427, 51017), (1037, 21007), (3001, 7259)]