1280491821

素因数分解:

$3^4\times 7^1\times {\mathrm{2258363}}^1$

素因数の和:2258382

約数の個数: 20

約数和(自身を含む): 2186096352

約数和(自身を除く): 905604531

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 2258363, 6775089, 15808541, 20325267, 47425623, 60975801, 142276869, 182927403, 426830607, 1280491821]

約数ペア:

[(1, 1280491821), (3, 426830607), (7, 182927403), (9, 142276869), (21, 60975801), (27, 47425623), (63, 20325267), (81, 15808541), (189, 6775089), (567, 2258363)]