D₂₅₆ = (1, 2, 4, 8, 32, 16, 64, 128, 256)
D₃₀₆ = (1, 2, 3, 6, 9, 17, 18, 34, 51, 102, 153, 306)
D₄₀₄₀₄ = (1, 2, 3, 4, 6, 7, 12, 13, 14, 21, 26, 28, 37, 39, 42, 962, 52, 777, 1036, 1092, 1443, 1554, 1924, 2886, 3108, 3367, 5772, 6734, 10101, 13468, 20202, 40404)
cel mare număr de divizori 120
și cel mai mic 241