20415766

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:169

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 19397354

約数列:

[1, 2, 7, 14, 19, 23, 38, 46, 47, 71, 94, 133, 142, 161, 266, 322, 329, 437, 497, 658, 874, 893, 994, 1081, 1349, 1633, 1786, 2162, 2698, 3059, 3266, 3337, 6118, 6251, 6674, 7567, 9443, 11431, 12502, 15134, 18886, 20539, 22862, 23359, 31027, 41078, 46718, 62054, 63403, 76751, 126806, 143773, 153502, 217189, 287546, 434378, 443821, 537257, 887642, 1074514, 1458269, 2916538, 10207883, 20415766]

約数ペア:

[(1, 20415766), (2, 10207883), (7, 2916538), (14, 1458269), (19, 1074514), (23, 887642), (38, 537257), (46, 443821), (47, 434378), (71, 287546), (94, 217189), (133, 153502), (142, 143773), (161, 126806), (266, 76751), (322, 63403), (329, 62054), (437, 46718), (497, 41078), (658, 31027), (874, 23359), (893, 22862), (994, 20539), (1081, 18886), (1349, 15134), (1633, 12502), (1786, 11431), (2162, 9443), (2698, 7567), (3059, 6674), (3266, 6251), (3337, 6118)]