Entity Framework options to map list of strings or list of int (List<string>)

I want to store an object that contains a List of primitives using EF.

public class MyObject {
    public int Id {get;set;}
    public virtual IList<int> Numbers {get;set;}
}

I know that EF cannot store this, but I'd like to know possible solutions to solve this problem.

The 2 Solutions I can think of are:

1.Create a Dummy object that has an Id and the Integervalue, e.g.

public class MyObject {
    public int Id {get;set;}
    public virtual IList<MyInt> Numbers {get;set;}
}

public class MyInt {
    public int Id {get;set;}
    public int Number {get;set;}
}

2.Store the list values as a blob, e.g.

public class MyObject {
    public int Id {get;set;}

    /// use NumbersValue to persist/load the list values
    public string NumbersValue {get;set;}

    [NotMapped]
    public virtual IList<int> Numbers {
         get {
              return NumbersValue.split(',');
         }
         set {
             NumbersValue = value.ToArray().Join(",");
         }
    }
}

The Problem with the 2. approach is, that I have to create a Custom IList implementation to keep track if someone modifies the returned collection.

Is there a better solution for this?