The numbers are called natural numbers
1, 2, 3, 4 etc. There is no greatest natural number, for every conceivable number can always be supplemented with a number. But there is a smallest natural number, namely 1. When we take or "multiply" two or more natural numbers together, this is the result, the product, again a natural number. For example:
2 · 7 · 11 · 13 = 2002
It is also said about it: The payment 2, 7,11 and 13 are factors of 2002. The number 2002 can therefore pass both 2,7 and 11 as well as through 13 share without remainder; one can 2002 also through 1 and through oneself be bst share (2002 :2002 = 1).