20528375

素因数分解:

$5^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{809}}^1$

素因数の和:860

約数の個数: 32

約数和(自身を含む): 30326400

約数和(自身を除く): 9798025

約数列:

[1, 5, 7, 25, 29, 35, 125, 145, 175, 203, 725, 809, 875, 1015, 3625, 4045, 5075, 5663, 20225, 23461, 25375, 28315, 101125, 117305, 141575, 164227, 586525, 707875, 821135, 2932625, 4105675, 20528375]

約数ペア:

[(1, 20528375), (5, 4105675), (7, 2932625), (25, 821135), (29, 707875), (35, 586525), (125, 164227), (145, 141575), (175, 117305), (203, 101125), (725, 28315), (809, 25375), (875, 23461), (1015, 20225), (3625, 5663), (4045, 5075)]