20953857

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{1279}}^1$

素因数の和:1452

約数の個数: 16

約数和(自身を含む): 28835840

約数和(自身を除く): 7881983

約数列:

[1, 3, 43, 127, 129, 381, 1279, 3837, 5461, 16383, 54997, 162433, 164991, 487299, 6984619, 20953857]

約数ペア:

[(1, 20953857), (3, 6984619), (43, 487299), (127, 164991), (129, 162433), (381, 54997), (1279, 16383), (3837, 5461)]