20990907

素因数分解:

$3^4\times 7^1\times {\mathrm{37021}}^1$

素因数の和:37040

約数の個数: 20

約数和(自身を含む): 35837296

約数和(自身を除く): 14846389

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37021, 111063, 259147, 333189, 777441, 999567, 2332323, 2998701, 6996969, 20990907]

約数ペア:

[(1, 20990907), (3, 6996969), (7, 2998701), (9, 2332323), (21, 999567), (27, 777441), (63, 333189), (81, 259147), (189, 111063), (567, 37021)]