19809335

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{197}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 31306176

約数和(自身を除く): 11496841

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 169, 197, 221, 455, 595, 845, 985, 1105, 1183, 1379, 1547, 2561, 2873, 3349, 5915, 6895, 7735, 12805, 14365, 16745, 17927, 20111, 23443, 33293, 43537, 89635, 100555, 117215, 166465, 217685, 233051, 304759, 565981, 1165255, 1523795, 2829905, 3961867, 19809335]

約数ペア:

[(1, 19809335), (5, 3961867), (7, 2829905), (13, 1523795), (17, 1165255), (35, 565981), (65, 304759), (85, 233051), (91, 217685), (119, 166465), (169, 117215), (197, 100555), (221, 89635), (455, 43537), (595, 33293), (845, 23443), (985, 20111), (1105, 17927), (1183, 16745), (1379, 14365), (1547, 12805), (2561, 7735), (2873, 6895), (3349, 5915)]