r软件  怎样导出summary()里面的Residual standard error值

"RV1 =beta0  + beta1 * RV1 +  beta2 * RV5 +  beta3 * RV22"

Residuals:

       Min         1Q    Median         3Q        Max

-7.635e-05-1.748e-05 -7.700e-06  4.940e-06  5.546e-04

Coefficients:

       Estimate Std. Error  t value  Pr(>|t|)  

beta01.947e-05  8.416e-06   2.314 0.02148 *

beta11.232e-01  7.411e-02   1.663 0.09758 .

beta23.802e-01  1.413e-01   2.691 0.00759 **

beta31.756e-01  1.704e-01   1.030 0.30378   

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Signif.codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘’ 1

Residualstandard error: 5.078e-05 on 251 degrees offreedom

MultipleR-squared:  0.1531,    Adjusted R-squared:  0.143

F-statistic:15.13 on 3 and 251 DF,  p-value:4.427e-09

想要导出上面运行结果中红色的数据，怎么办呢？