What numbers are multiples of 2 to 1000?

If you mean the LCM (lowest common multiple) of 2 and 1000, the answer is 1000.

If you mean the factors of 2 and 1000, then they are as follows.

Factors of 2- 1,2.

Factors of 1000- 1,2,4,5,8,10,100,125,200,250,500,1000.

Therefore, the HCF (highest common factor) of 2 and 1000 is 2.