20493891

素因数分解:

$3^5\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1$

素因数の和:95

約数の個数: 72

約数和(自身を含む): 36599472

約数和(自身を除く): 16105581

約数列:

[1, 3, 9, 11, 17, 27, 33, 41, 51, 81, 99, 121, 123, 153, 187, 243, 297, 363, 369, 451, 459, 561, 697, 891, 1089, 1107, 1353, 1377, 1683, 2057, 2091, 2673, 3267, 3321, 4059, 4131, 4961, 5049, 6171, 6273, 7667, 9801, 9963, 12177, 14883, 15147, 18513, 18819, 23001, 29403, 36531, 44649, 45441, 55539, 56457, 69003, 84337, 109593, 133947, 166617, 169371, 207009, 253011, 401841, 499851, 621027, 759033, 1205523, 1863081, 2277099, 6831297, 20493891]

約数ペア:

[(1, 20493891), (3, 6831297), (9, 2277099), (11, 1863081), (17, 1205523), (27, 759033), (33, 621027), (41, 499851), (51, 401841), (81, 253011), (99, 207009), (121, 169371), (123, 166617), (153, 133947), (187, 109593), (243, 84337), (297, 69003), (363, 56457), (369, 55539), (451, 45441), (459, 44649), (561, 36531), (697, 29403), (891, 23001), (1089, 18819), (1107, 18513), (1353, 15147), (1377, 14883), (1683, 12177), (2057, 9963), (2091, 9801), (2673, 7667), (3267, 6273), (3321, 6171), (4059, 5049), (4131, 4961)]