Which of the following is/are correct?

A. A factor of a number is the exact divisor of that number.

B. 1 is the multiple of every number.

C. If a number is divisible by two co-prime number then it is divisible
by their product also.

D. LCM of 2, 5 and 4 is 10.

E. Every multiple of the number is smaller than the number.