21690116

素因数分解:

$2^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{5573}}^1$

素因数の和:5723

約数の個数: 24

約数和(自身を含む): 43700160

約数和(自身を除く): 22010044

約数列:

[1, 2, 4, 7, 14, 28, 139, 278, 556, 973, 1946, 3892, 5573, 11146, 22292, 39011, 78022, 156044, 774647, 1549294, 3098588, 5422529, 10845058, 21690116]

約数ペア:

[(1, 21690116), (2, 10845058), (4, 5422529), (7, 3098588), (14, 1549294), (28, 774647), (139, 156044), (278, 78022), (556, 39011), (973, 22292), (1946, 11146), (3892, 5573)]