81689624020

素因数分解:

$2^2\times 5^1\times {\mathrm{4084481201}}^1$

素因数の和:4084481210

約数の個数: 12

約数和(自身を含む): 171548210484

約数和(自身を除く): 89858586464

約数列:

[1, 2, 4, 5, 10, 20, 4084481201, 8168962402, 16337924804, 20422406005, 40844812010, 81689624020]

約数ペア:

[(1, 81689624020), (2, 40844812010), (4, 20422406005), (5, 16337924804), (10, 8168962402), (20, 4084481201)]