257290448

素因数分解:

$2^4\times {\mathrm{409}}^1\times {\mathrm{39317}}^1$

素因数の和:39734

約数の個数: 20

約数和(自身を含む): 499731780

約数和(自身を除く): 242441332

約数列:

[1, 2, 4, 8, 16, 409, 818, 1636, 3272, 6544, 39317, 78634, 157268, 314536, 629072, 16080653, 32161306, 64322612, 128645224, 257290448]

約数ペア:

[(1, 257290448), (2, 128645224), (4, 64322612), (8, 32161306), (16, 16080653), (409, 629072), (818, 314536), (1636, 157268), (3272, 78634), (6544, 39317)]