20639745

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{21841}}^1$

素因数の和:21862

約数の個数: 32

約数和(自身を含む): 41936640

約数和(自身を除く): 21296895

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945, 21841, 65523, 109205, 152887, 196569, 327615, 458661, 589707, 764435, 982845, 1375983, 2293305, 2948535, 4127949, 6879915, 20639745]

約数ペア:

[(1, 20639745), (3, 6879915), (5, 4127949), (7, 2948535), (9, 2293305), (15, 1375983), (21, 982845), (27, 764435), (35, 589707), (45, 458661), (63, 327615), (105, 196569), (135, 152887), (189, 109205), (315, 65523), (945, 21841)]