20561709

素因数分解:

$3^1\times 7^1\times {\mathrm{709}}^1\times {\mathrm{1381}}^1$

素因数の和:2100

約数の個数: 16

約数和(自身を含む): 31399040

約数和(自身を除く): 10837331

約数列:

[1, 3, 7, 21, 709, 1381, 2127, 4143, 4963, 9667, 14889, 29001, 979129, 2937387, 6853903, 20561709]

約数ペア:

[(1, 20561709), (3, 6853903), (7, 2937387), (21, 979129), (709, 29001), (1381, 14889), (2127, 9667), (4143, 4963)]