128020810

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{180311}}^1$

素因数の和:180389

約数の個数: 16

約数和(自身を含む): 233684352

約数和(自身を除く): 105663542

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 180311, 360622, 901555, 1803110, 12802081, 25604162, 64010405, 128020810]

約数ペア:

[(1, 128020810), (2, 64010405), (5, 25604162), (10, 12802081), (71, 1803110), (142, 901555), (355, 360622), (710, 180311)]