19900485

素因数分解:

$3^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1489}}^1$

素因数の和:1520

約数の個数: 48

約数和(自身を含む): 39049920

約数和(自身を除く): 19149435

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 135, 165, 243, 297, 405, 495, 891, 1215, 1485, 1489, 2673, 4455, 4467, 7445, 13365, 13401, 16379, 22335, 40203, 49137, 67005, 81895, 120609, 147411, 201015, 245685, 361827, 442233, 603045, 737055, 1326699, 1809135, 2211165, 3980097, 6633495, 19900485]

約数ペア:

[(1, 19900485), (3, 6633495), (5, 3980097), (9, 2211165), (11, 1809135), (15, 1326699), (27, 737055), (33, 603045), (45, 442233), (55, 361827), (81, 245685), (99, 201015), (135, 147411), (165, 120609), (243, 81895), (297, 67005), (405, 49137), (495, 40203), (891, 22335), (1215, 16379), (1485, 13401), (1489, 13365), (2673, 7445), (4455, 4467)]