20909008

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30391}}^1$

素因数の和:30442

約数の個数: 20

約数和(自身を含む): 41454688

約数和(自身を除く): 20545680

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30391, 60782, 121564, 243128, 486256, 1306813, 2613626, 5227252, 10454504, 20909008]

約数ペア:

[(1, 20909008), (2, 10454504), (4, 5227252), (8, 2613626), (16, 1306813), (43, 486256), (86, 243128), (172, 121564), (344, 60782), (688, 30391)]