21291669

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{8243}}^1$

素因数の和:8297

約数の個数: 24

約数和(自身を含む): 36009792

約数和(自身を除く): 14718123

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 287, 369, 861, 2583, 8243, 24729, 57701, 74187, 173103, 337963, 519309, 1013889, 2365741, 3041667, 7097223, 21291669]

約数ペア:

[(1, 21291669), (3, 7097223), (7, 3041667), (9, 2365741), (21, 1013889), (41, 519309), (63, 337963), (123, 173103), (287, 74187), (369, 57701), (861, 24729), (2583, 8243)]