257004215

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{17891}}^1$

素因数の和:17939

約数の個数: 24

約数和(自身を含む): 353617488

約数和(自身を除く): 96613273

約数列:

[1, 5, 13, 17, 65, 85, 169, 221, 845, 1105, 2873, 14365, 17891, 89455, 232583, 304147, 1162915, 1520735, 3023579, 3953911, 15117895, 19769555, 51400843, 257004215]

約数ペア:

[(1, 257004215), (5, 51400843), (13, 19769555), (17, 15117895), (65, 3953911), (85, 3023579), (169, 1520735), (221, 1162915), (845, 304147), (1105, 232583), (2873, 89455), (14365, 17891)]