20898549

素因数分解:

$3^2\times 7^2\times {\mathrm{47389}}^1$

素因数の和:47409

約数の個数: 18

約数和(自身を含む): 35115990

約数和(自身を除く): 14217441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 47389, 142167, 331723, 426501, 995169, 2322061, 2985507, 6966183, 20898549]

約数ペア:

[(1, 20898549), (3, 6966183), (7, 2985507), (9, 2322061), (21, 995169), (49, 426501), (63, 331723), (147, 142167), (441, 47389)]