201721025

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{17891}}^1$

素因数の和:17953

約数の個数: 24

約数和(自身を含む): 279544608

約数和(自身を除く): 77823583

約数列:

[1, 5, 11, 25, 41, 55, 205, 275, 451, 1025, 2255, 11275, 17891, 89455, 196801, 447275, 733531, 984005, 3667655, 4920025, 8068841, 18338275, 40344205, 201721025]

約数ペア:

[(1, 201721025), (5, 40344205), (11, 18338275), (25, 8068841), (41, 4920025), (55, 3667655), (205, 984005), (275, 733531), (451, 447275), (1025, 196801), (2255, 89455), (11275, 17891)]