What are the factors of 1-40?

Answer 1

I'll give you the first ten. That should give you enough information to work out the rest.

1

1,2

1,3

1,2,4

1,5

1,2,3,6

1,7

1,2,4,8

1,3,9

1,2,5,10

Answer 2

The positive integer factors of 140 are: 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140.

The prime factorization is 2 x 2 x 5 x 7. Any product of these integers would be a factor.