19811385

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{4447}}^1$

素因数の和:4475

約数の個数: 40

約数和(自身を含む): 38750976

約数和(自身を除く): 18939591

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 135, 165, 297, 405, 495, 891, 1485, 4447, 4455, 13341, 22235, 40023, 48917, 66705, 120069, 146751, 200115, 244585, 360207, 440253, 600345, 733755, 1320759, 1801035, 2201265, 3962277, 6603795, 19811385]

約数ペア:

[(1, 19811385), (3, 6603795), (5, 3962277), (9, 2201265), (11, 1801035), (15, 1320759), (27, 733755), (33, 600345), (45, 440253), (55, 360207), (81, 244585), (99, 200115), (135, 146751), (165, 120069), (297, 66705), (405, 48917), (495, 40023), (891, 22235), (1485, 13341), (4447, 4455)]