28084221

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:123

約数の個数: 72

約数和(自身を含む): 49670712

約数和(自身を除く): 21586491

約数列:

[1, 3, 9, 11, 17, 33, 37, 41, 51, 99, 111, 121, 123, 153, 187, 333, 363, 369, 407, 451, 561, 629, 697, 1089, 1221, 1353, 1517, 1683, 1887, 2057, 2091, 3663, 4059, 4477, 4551, 4961, 5661, 6171, 6273, 6919, 7667, 13431, 13653, 14883, 16687, 18513, 20757, 23001, 25789, 40293, 44649, 50061, 62271, 69003, 76109, 77367, 84337, 150183, 183557, 228327, 232101, 253011, 283679, 550671, 684981, 759033, 851037, 1652013, 2553111, 3120469, 9361407, 28084221]

約数ペア:

[(1, 28084221), (3, 9361407), (9, 3120469), (11, 2553111), (17, 1652013), (33, 851037), (37, 759033), (41, 684981), (51, 550671), (99, 283679), (111, 253011), (121, 232101), (123, 228327), (153, 183557), (187, 150183), (333, 84337), (363, 77367), (369, 76109), (407, 69003), (451, 62271), (561, 50061), (629, 44649), (697, 40293), (1089, 25789), (1221, 23001), (1353, 20757), (1517, 18513), (1683, 16687), (1887, 14883), (2057, 13653), (2091, 13431), (3663, 7667), (4059, 6919), (4477, 6273), (4551, 6171), (4961, 5661)]