20685040

素因数分解:

$2^4\times 5^1\times {\mathrm{258563}}^1$

素因数の和:258576

約数の個数: 20

約数和(自身を含む): 48092904

約数和(自身を除く): 27407864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258563, 517126, 1034252, 1292815, 2068504, 2585630, 4137008, 5171260, 10342520, 20685040]

約数ペア:

[(1, 20685040), (2, 10342520), (4, 5171260), (5, 4137008), (8, 2585630), (10, 2068504), (16, 1292815), (20, 1034252), (40, 517126), (80, 258563)]