20504080

素因数分解:

$2^4\times 5^1\times {\mathrm{256301}}^1$

素因数の和:256314

約数の個数: 20

約数和(自身を含む): 47672172

約数和(自身を除く): 27168092

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256301, 512602, 1025204, 1281505, 2050408, 2563010, 4100816, 5126020, 10252040, 20504080]

約数ペア:

[(1, 20504080), (2, 10252040), (4, 5126020), (5, 4100816), (8, 2563010), (10, 2050408), (16, 1281505), (20, 1025204), (40, 512602), (80, 256301)]