20657931

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{22877}}^1$

素因数の和:22930

約数の個数: 16

約数和(自身を含む): 32212224

約数和(自身を除く): 11554293

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 22877, 68631, 160139, 480417, 983711, 2951133, 6885977, 20657931]

約数ペア:

[(1, 20657931), (3, 6885977), (7, 2951133), (21, 983711), (43, 480417), (129, 160139), (301, 68631), (903, 22877)]