21199684

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43801}}^1$

素因数の和:43827

約数の個数: 18

約数和(自身を含む): 40779662

約数和(自身を除く): 19579978

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43801, 87602, 175204, 481811, 963622, 1927244, 5299921, 10599842, 21199684]

約数ペア:

[(1, 21199684), (2, 10599842), (4, 5299921), (11, 1927244), (22, 963622), (44, 481811), (121, 175204), (242, 87602), (484, 43801)]