20898928

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{9397}}^1$

素因数の和:9544

約数の個数: 20

約数和(自身を含む): 40787320

約数和(自身を除く): 19888392

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 9397, 18794, 37588, 75176, 150352, 1306183, 2612366, 5224732, 10449464, 20898928]

約数ペア:

[(1, 20898928), (2, 10449464), (4, 5224732), (8, 2612366), (16, 1306183), (139, 150352), (278, 75176), (556, 37588), (1112, 18794), (2224, 9397)]