Question

number of proper divisors of
1800 is equal to​

Answer 1

Answer:

1800=2

3

×3

2

×5

2

=10(2

2

×3

2

×5

1

)

Step-by-step explanation:

The number of proper divisors of 1800 which are also divisible by 10 are given by the factors of the numbers which is inside the parenthesis

∴ number of factors divisible by 10=(2+1)(2+1)(1+1)=18

But one of the above factors is 1800 which is not a proper divisor

So, The number of proper divisors of 1800 which are also divisible by 10=17

Answer 2

Answer:

2 Answer

Step-by-step explanation:

we have 3×3×2=18 factors. Now as you say, the number itself is included (1800) in this. If you need proper factors, then they are 18−1=17 in number.