19987707

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1\times {\mathrm{877}}^1$

素因数の和:1058

約数の個数: 16

約数和(自身を含む): 27309312

約数和(自身を除く): 7321605

約数列:

[1, 3, 71, 107, 213, 321, 877, 2631, 7597, 22791, 62267, 93839, 186801, 281517, 6662569, 19987707]

約数ペア:

[(1, 19987707), (3, 6662569), (71, 281517), (107, 186801), (213, 93839), (321, 62267), (877, 22791), (2631, 7597)]