21120165

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42667}}^1$

素因数の和:42689

約数の個数: 24

約数和(自身を含む): 39937248

約数和(自身を除く): 18817083

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42667, 128001, 213335, 384003, 469337, 640005, 1408011, 1920015, 2346685, 4224033, 7040055, 21120165]

約数ペア:

[(1, 21120165), (3, 7040055), (5, 4224033), (9, 2346685), (11, 1920015), (15, 1408011), (33, 640005), (45, 469337), (55, 384003), (99, 213335), (165, 128001), (495, 42667)]