16: 1 2 3 5 6 7 10 14 15 21 30 35 42 70 105 210.
1,2,3,5,6,7,14,15,10,21,30,35,42,70,105,210
210-6-1 = 203 of them
None, if a number is divisible by 210 then it is not a prime number!
10C6 = 210
210 ÷ 6 = 35
210 times.
Two significant figures.
210 ÷ 14 = 15
210 ÷ 6 = 35
210 ÷ 5 = 42
2 significant figures.
105, 210 and 315