JEE Mains Model Paper 13

2 can take in 2 ways (20 or 22)
3 can take in 3 ways (30 or 32 or 34)
5 can take in 4 ways (50 or 52 or 54 or 56)
7 can take in 5 ways (70 or 72 or 74 or 76 or 78)
∴ Total divisors which are perfect squares = 2 x 3 x 4 x 5 = 120