These are factors of 40. \(4 \times 10 = 40\) would be one way of doing this calculation. Every integer has a unique prime factorisation, so it doesn’t matter which factors are chosen to start ...

A prime number has exactly two factors, itself and one. The first ten prime numbers are \({2}\), \({3}\), \({5}\), \({7}\), \({11}\), \({13}\), \({17}\), \({19 ...