19787181

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{977}}^1$

素因数の和:1180

約数の個数: 16

約数和(自身を含む): 27196224

約数和(自身を除く): 7409043

約数列:

[1, 3, 43, 129, 157, 471, 977, 2931, 6751, 20253, 42011, 126033, 153389, 460167, 6595727, 19787181]

約数ペア:

[(1, 19787181), (3, 6595727), (43, 460167), (129, 153389), (157, 126033), (471, 42011), (977, 20253), (2931, 6751)]