217989555

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{1259}}^1$

素因数の和:1388

約数の個数: 64

約数和(自身を含む): 426746880

約数和(自身を除く): 208757325

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 97, 105, 119, 255, 291, 357, 485, 595, 679, 1259, 1455, 1649, 1785, 2037, 3395, 3777, 4947, 6295, 8245, 8813, 10185, 11543, 18885, 21403, 24735, 26439, 34629, 44065, 57715, 64209, 107015, 122123, 132195, 149821, 173145, 321045, 366369, 449463, 610615, 749105, 854861, 1831845, 2076091, 2247315, 2564583, 4274305, 6228273, 10380455, 12822915, 14532637, 31141365, 43597911, 72663185, 217989555]

約数ペア:

[(1, 217989555), (3, 72663185), (5, 43597911), (7, 31141365), (15, 14532637), (17, 12822915), (21, 10380455), (35, 6228273), (51, 4274305), (85, 2564583), (97, 2247315), (105, 2076091), (119, 1831845), (255, 854861), (291, 749105), (357, 610615), (485, 449463), (595, 366369), (679, 321045), (1259, 173145), (1455, 149821), (1649, 132195), (1785, 122123), (2037, 107015), (3395, 64209), (3777, 57715), (4947, 44065), (6295, 34629), (8245, 26439), (8813, 24735), (10185, 21403), (11543, 18885)]