78520180

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{28657}}^1$

素因数の和:28803

約数の個数: 24

約数和(自身を含む): 166101768

約数和(自身を除く): 87581588

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 28657, 57314, 114628, 143285, 286570, 573140, 3926009, 7852018, 15704036, 19630045, 39260090, 78520180]

約数ペア:

[(1, 78520180), (2, 39260090), (4, 19630045), (5, 15704036), (10, 7852018), (20, 3926009), (137, 573140), (274, 286570), (548, 143285), (685, 114628), (1370, 57314), (2740, 28657)]