280536417

素因数分解:

$3^2\times 7^2\times {\mathrm{636137}}^1$

素因数の和:636157

約数の個数: 18

約数和(自身を含む): 471378258

約数和(自身を除く): 190841841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 636137, 1908411, 4452959, 5725233, 13358877, 31170713, 40076631, 93512139, 280536417]

約数ペア:

[(1, 280536417), (3, 93512139), (7, 40076631), (9, 31170713), (21, 13358877), (49, 5725233), (63, 4452959), (147, 1908411), (441, 636137)]