20657749

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{4139}}^1$

素因数の和:4200

約数の個数: 16

約数和(自身を含む): 25436160

約数和(自身を除く): 4778411

約数列:

[1, 7, 23, 31, 161, 217, 713, 4139, 4991, 28973, 95197, 128309, 666379, 898163, 2951107, 20657749]

約数ペア:

[(1, 20657749), (7, 2951107), (23, 898163), (31, 666379), (161, 128309), (217, 95197), (713, 28973), (4139, 4991)]