1 and 41.
41 is a prime number so only 1 and 41 go into it.
41 and 41 1681 and 1
29 and 41
41*1
2 and 41
1 and 41.
More than two numbers go into 1640 - excluding 1 and 1640, 2, 5 and 41: 2 x 2 x 2 x 2 x 5 x 41 = 1640.
As 41 is a prime number, the only two positive whole numbers that multiply together to make 41 are 1 and 41: 1 x 41 = 41
41 is a prime number so only 1 and 41 go into it.
1 and 41.
The factors of 41 are 1 and 41. It is therefore, a Prime number.
Since both 13 and 41 are prime, the only common positive integer that is shared by the two numbers is 1.
They are: 20+21 = 41
41 and 41 1681 and 1
41
29 and 41