81965140

素因数分解:

$2^2\times 5^1\times {\mathrm{337}}^1\times {\mathrm{12161}}^1$

素因数の和:12507

約数の個数: 24

約数和(自身を含む): 172651752

約数和(自身を除く): 90686612

約数列:

[1, 2, 4, 5, 10, 20, 337, 674, 1348, 1685, 3370, 6740, 12161, 24322, 48644, 60805, 121610, 243220, 4098257, 8196514, 16393028, 20491285, 40982570, 81965140]

約数ペア:

[(1, 81965140), (2, 40982570), (4, 20491285), (5, 16393028), (10, 8196514), (20, 4098257), (337, 243220), (674, 121610), (1348, 60805), (1685, 48644), (3370, 24322), (6740, 12161)]