Factorization
144 = 2 × 2 × 2 × 2 × 3 × 3
144 has 15 divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144
Sum of all divisors other than 144:
259144 = 12 2
144 = 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + ... + 23
Sums & differences
Difference of 2 squares: 144 = 132 - 52 = 152 - 92 = 202 - 162 = 372 - 352
Goldbach conjecture: 144 = 139 + 5 = 137 + 7 = 131 + 13 = 127 + 17 = 113 + 31 = 107 + 37 = 103 + 41 = 101 + 43 = 97 + 47 = 83 + 61 = . . . (only the first 10 pairs are shown)
