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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int cmp(const void *x, const void *y)
{
long z = *(long *) x - *(long *) y;
if (z < 0)
return -1;
if (z)
return 1;
return 0;
}
int main()
{
FILE *fi = fopen("EP.INP", "r"), *fo = fopen("EP.OUT", "w");
char t;
long a, b, c, p[1000001], q[1000001];
long long count;
for (a = 1; a < 1000001; a++) {
p[a] = 1;
}
for (a = 2; a < 1001; a++)
if (p[a] == 1)
for (b = a; b < 1000001; b += a)
p[b] *= a;
fscanf(fi, "%hhd\n", &t);
for (; t--;) {
fscanf(fi, "%ld %ld\n", &a, &b);
b -= a - 1;
memcpy(q, p + a, b * sizeof(long));
qsort(q, b, sizeof(long), cmp);
count = 0;
for (a = c = 1; a < b; a++)
if (q[a] != q[a - 1]) {
count += c * (c - 1) / 2;
c = 1;
} else {
c++;
}
fprintf(fo, "%Ld\n", count);
}
fclose(fi);
fclose(fo);
return 0;
}
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