21204085

素因数分解:

$5^1\times 7^1\times {\mathrm{571}}^1\times {\mathrm{1061}}^1$

素因数の和:1644

約数の個数: 16

約数和(自身を含む): 29158272

約数和(自身を除く): 7954187

約数列:

[1, 5, 7, 35, 571, 1061, 2855, 3997, 5305, 7427, 19985, 37135, 605831, 3029155, 4240817, 21204085]

約数ペア:

[(1, 21204085), (5, 4240817), (7, 3029155), (35, 605831), (571, 37135), (1061, 19985), (2855, 7427), (3997, 5305)]