The first number to have exactly 10 divisors is 48.
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It is 192.
60. The number 60 has 12 divisors if you are counting the 1 and 60. The divisors (given as factor pairs) are 1, 60, 2, 30, 3, 20, 4, 15, 5, 12, 6, 10.
1,999,998 has exactly 1,000,000 divisors starting with 1, 2, 4, 6, 8,...up to 1,999,998.
The only numbers which divide into 89 exactly are 1 and 89. These are called factors or divisors. Any number which has exactly 2 divisors (1 and the number itself) is a prime number.
I think you mean, the largest four digit number that has exactly three divisors. 2X3X1663=9,978