21286978

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{1949}}^1$

素因数の和:2121

約数の個数: 16

約数和(自身を含む): 32947200

約数和(自身を除く): 11660222

約数列:

[1, 2, 43, 86, 127, 254, 1949, 3898, 5461, 10922, 83807, 167614, 247523, 495046, 10643489, 21286978]

約数ペア:

[(1, 21286978), (2, 10643489), (43, 495046), (86, 247523), (127, 167614), (254, 83807), (1949, 10922), (3898, 5461)]