28781181

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 52284960

約数和(自身を除く): 23503779

約数列:

[1, 3, 9, 11, 13, 19, 33, 39, 57, 99, 107, 117, 121, 143, 171, 209, 247, 321, 363, 429, 627, 741, 963, 1089, 1177, 1287, 1391, 1573, 1881, 2033, 2223, 2299, 2717, 3531, 4173, 4719, 6099, 6897, 8151, 10593, 12519, 12947, 14157, 15301, 18297, 20691, 22363, 24453, 26429, 29887, 38841, 45903, 67089, 79287, 89661, 116523, 137709, 168311, 201267, 237861, 245993, 268983, 290719, 504933, 737979, 872157, 1514799, 2213937, 2616471, 3197909, 9593727, 28781181]

約数ペア:

[(1, 28781181), (3, 9593727), (9, 3197909), (11, 2616471), (13, 2213937), (19, 1514799), (33, 872157), (39, 737979), (57, 504933), (99, 290719), (107, 268983), (117, 245993), (121, 237861), (143, 201267), (171, 168311), (209, 137709), (247, 116523), (321, 89661), (363, 79287), (429, 67089), (627, 45903), (741, 38841), (963, 29887), (1089, 26429), (1177, 24453), (1287, 22363), (1391, 20691), (1573, 18297), (1881, 15301), (2033, 14157), (2223, 12947), (2299, 12519), (2717, 10593), (3531, 8151), (4173, 6897), (4719, 6099)]