20678049

素因数分解:

$3^2\times 7^2\times {\mathrm{46889}}^1$

素因数の和:46909

約数の個数: 18

約数和(自身を含む): 34745490

約数和(自身を除く): 14067441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 46889, 140667, 328223, 422001, 984669, 2297561, 2954007, 6892683, 20678049]

約数ペア:

[(1, 20678049), (3, 6892683), (7, 2954007), (9, 2297561), (21, 984669), (49, 422001), (63, 328223), (147, 140667), (441, 46889)]