Investigating Factors of numbers

Investigate the factors of the following numbers No. Factors Prime 1 11 2 12 3 13 4 14 5 15 6 16 7 17 8 18 9 19 10 20 Prime numbers are numbers that have exactly two different factors ( no more / no less) They have 1 and themselves

Prime numbers are numbers that have exactly two different factors No. Factors 1 11 2 12 3 13 4 14 5 15 6 16 7 17 8 18 9 19 10 20 Prime Prime 1 No 1, 11 Yes 1, 2 Yes 1, 2, 3, 4, 6, 12 No Prime numbers are numbers that have exactly two different factors ( no more / no less) They have 1 and themselves 1, 3 Yes Yes 1, 13 1, 2, 4 1, 2,7, 14 No No 1, 5 Yes 1, 3, 5, 15 No 1, 2, 3, 6 No 1, 2, 4,8,16 No 1, 7 Yes 1, 17 Yes 1, 2, 4, 8 No 1, 2, 3, 6, 9, 18 No 1, 3, 9 No 1, 19 Yes 1, 2, 5, 10 No 1, 2, 4, 5, 10, 20 No Prime numbers are numbers that have exactly two different factors ( no more / no less) They have 1 and themselves

The first fifteen Prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47 Prime factors of a number Find the factors of a number and say which are prime e.g1 Find the prime factors of(i) 10 and (ii) 16 10 Prime factors of 10 are 2 and 5 16 `Prime factor of 16 is 2 1 x 10 1 x 16 2 x 5 2 x 8 4 x 4