Factorization
180 = 2 × 2 × 3 × 3 × 5
180 has 18 divisors: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180
Sum of all divisors other than 180:
366
Sums & differences
Sum of 2 squares: 180 = 122 + 62
Difference of 2 squares: 180 = 142 - 42 = 182 - 122 = 462 - 442
Goldbach conjecture: 180 = 173 + 7 = 167 + 13 = 163 + 17 = 157 + 23 = 151 + 29 = 149 + 31 = 139 + 41 = 137 + 43 = 127 + 53 = 113 + 67 = . . . (only the first 10 pairs are shown)
