19905904

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{28933}}^1$

素因数の和:28984

約数の個数: 20

約数和(自身を含む): 39465976

約数和(自身を除く): 19560072

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 28933, 57866, 115732, 231464, 462928, 1244119, 2488238, 4976476, 9952952, 19905904]

約数ペア:

[(1, 19905904), (2, 9952952), (4, 4976476), (8, 2488238), (16, 1244119), (43, 462928), (86, 231464), (172, 115732), (344, 57866), (688, 28933)]