20981485

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{197}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 30792960

約数和(自身を除く): 9811475

約数列:

[1, 5, 7, 17, 35, 85, 119, 179, 197, 595, 895, 985, 1253, 1379, 3043, 3349, 6265, 6895, 15215, 16745, 21301, 23443, 35263, 106505, 117215, 176315, 246841, 599471, 1234205, 2997355, 4196297, 20981485]

約数ペア:

[(1, 20981485), (5, 4196297), (7, 2997355), (17, 1234205), (35, 599471), (85, 246841), (119, 176315), (179, 117215), (197, 106505), (595, 35263), (895, 23443), (985, 21301), (1253, 16745), (1379, 15215), (3043, 6895), (3349, 6265)]