Multiply to do 39 and + - to 1
How about: 13 times 13 = 169
13*31=403 13 and 31 are prime numbers.
To find two numbers that multiply to 221, we need to factorize 221. The prime factorization of 221 is 13 x 17. Therefore, the two numbers that multiply to 221 are 13 and 17. So, 13 x 17 = 221.
They are: 23+3 = 26
-1
27
35
13
13
-13
-13
-145
-13
391
13
49