#include <stdio.h>
long long ndiv(int n)
{
    int i;
    long long s;
    s=0;
    for(i=1; (long long)i*i<=n; i++)
        s=s+1+2LL*(n/i-i);
    return s;
}
int main()
{
    FILE *fin, *fout;
    fin=fopen("ndiv.in", "r");
    fout=fopen("ndiv.out", "w");
    int i, a, b, s;
    fscanf(fin, "%d%d", &a, &b);
    fprintf(fout, "%lld", ndiv(b)-ndiv(a-1));
    return 0;
}