1278906489

素因数分解:

$3^4\times 7^1\times {\mathrm{2255567}}^1$

素因数の和:2255586

約数の個数: 20

約数和(自身を含む): 2183389824

約数和(自身を除く): 904483335

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 2255567, 6766701, 15788969, 20300103, 47366907, 60900309, 142100721, 182700927, 426302163, 1278906489]

約数ペア:

[(1, 1278906489), (3, 426302163), (7, 182700927), (9, 142100721), (21, 60900309), (27, 47366907), (63, 20300103), (81, 15788969), (189, 6766701), (567, 2255567)]