21080164

素因数分解:

$2^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{6907}}^1$

素因数の和:7027

約数の個数: 24

約数和(自身を含む): 42553280

約数和(自身を除く): 21473116

約数列:

[1, 2, 4, 7, 14, 28, 109, 218, 436, 763, 1526, 3052, 6907, 13814, 27628, 48349, 96698, 193396, 752863, 1505726, 3011452, 5270041, 10540082, 21080164]

約数ペア:

[(1, 21080164), (2, 10540082), (4, 5270041), (7, 3011452), (14, 1505726), (28, 752863), (109, 193396), (218, 96698), (436, 48349), (763, 27628), (1526, 13814), (3052, 6907)]