21160964

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43721}}^1$

素因数の和:43747

約数の個数: 18

約数和(自身を含む): 40705182

約数和(自身を除く): 19544218

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43721, 87442, 174884, 480931, 961862, 1923724, 5290241, 10580482, 21160964]

約数ペア:

[(1, 21160964), (2, 10580482), (4, 5290241), (11, 1923724), (22, 961862), (44, 480931), (121, 174884), (242, 87442), (484, 43721)]