20127681

素因数分解:

$3^2\times 7^2\times {\mathrm{45641}}^1$

素因数の和:45661

約数の個数: 18

約数和(自身を含む): 33820722

約数和(自身を除く): 13693041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45641, 136923, 319487, 410769, 958461, 2236409, 2875383, 6709227, 20127681]

約数ペア:

[(1, 20127681), (3, 6709227), (7, 2875383), (9, 2236409), (21, 958461), (49, 410769), (63, 319487), (147, 136923), (441, 45641)]