20689664

素因数分解:

$2^8\times {\mathrm{80819}}^1$

素因数の和:80835

約数の個数: 18

約数和(自身を含む): 41299020

約数和(自身を除く): 20609356

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 256, 80819, 161638, 323276, 646552, 1293104, 2586208, 5172416, 10344832, 20689664]

約数ペア:

[(1, 20689664), (2, 10344832), (4, 5172416), (8, 2586208), (16, 1293104), (32, 646552), (64, 323276), (128, 161638), (256, 80819)]