20781585

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41983}}^1$

素因数の和:42005

約数の個数: 24

約数和(自身を含む): 39297024

約数和(自身を除く): 18515439

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 41983, 125949, 209915, 377847, 461813, 629745, 1385439, 1889235, 2309065, 4156317, 6927195, 20781585]

約数ペア:

[(1, 20781585), (3, 6927195), (5, 4156317), (9, 2309065), (11, 1889235), (15, 1385439), (33, 629745), (45, 461813), (55, 377847), (99, 209915), (165, 125949), (495, 41983)]