251180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{661}}^1$

素因数の和:689

約数の個数: 24

約数和(自身を含む): 556080

約数和(自身を除く): 304900

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 661, 1322, 2644, 3305, 6610, 12559, 13220, 25118, 50236, 62795, 125590, 251180]

約数ペア:

[(1, 251180), (2, 125590), (4, 62795), (5, 50236), (10, 25118), (19, 13220), (20, 12559), (38, 6610), (76, 3305), (95, 2644), (190, 1322), (380, 661)]