81538175

素因数分解:

$5^2\times {\mathrm{71}}^2\times {\mathrm{647}}^1$

素因数の和:799

約数の個数: 18

約数和(自身を含む): 102709944

約数和(自身を除く): 21171769

約数列:

[1, 5, 25, 71, 355, 647, 1775, 3235, 5041, 16175, 25205, 45937, 126025, 229685, 1148425, 3261527, 16307635, 81538175]

約数ペア:

[(1, 81538175), (5, 16307635), (25, 3261527), (71, 1148425), (355, 229685), (647, 126025), (1775, 45937), (3235, 25205), (5041, 16175)]