18128375

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{449}}^1$

素因数の和:500

約数の個数: 32

約数和(自身を含む): 25272000

約数和(自身を除く): 7143625

約数列:

[1, 5, 17, 19, 25, 85, 95, 125, 323, 425, 449, 475, 1615, 2125, 2245, 2375, 7633, 8075, 8531, 11225, 38165, 40375, 42655, 56125, 145027, 190825, 213275, 725135, 954125, 1066375, 3625675, 18128375]

約数ペア:

[(1, 18128375), (5, 3625675), (17, 1066375), (19, 954125), (25, 725135), (85, 213275), (95, 190825), (125, 145027), (323, 56125), (425, 42655), (449, 40375), (475, 38165), (1615, 11225), (2125, 8531), (2245, 8075), (2375, 7633)]