278452993

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71161}}^1$

素因数の和:71224

約数の個数: 16

約数和(自身を含む): 350686336

約数和(自身を除く): 72233343

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 71161, 498127, 925093, 3059923, 6475651, 21419461, 39778999, 278452993]

約数ペア:

[(1, 278452993), (7, 39778999), (13, 21419461), (43, 6475651), (91, 3059923), (301, 925093), (559, 498127), (3913, 71161)]