81595480

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5087}}^1$

素因数の和:5499

約数の個数: 32

約数和(自身を含む): 184083840

約数和(自身を除く): 102488360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 2005, 3208, 4010, 5087, 8020, 10174, 16040, 20348, 25435, 40696, 50870, 101740, 203480, 2039887, 4079774, 8159548, 10199435, 16319096, 20398870, 40797740, 81595480]

約数ペア:

[(1, 81595480), (2, 40797740), (4, 20398870), (5, 16319096), (8, 10199435), (10, 8159548), (20, 4079774), (40, 2039887), (401, 203480), (802, 101740), (1604, 50870), (2005, 40696), (3208, 25435), (4010, 20348), (5087, 16040), (8020, 10174)]