20978883

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{151}}^1\times {\mathrm{359}}^1$

素因数の和:559

約数の個数: 24

約数和(自身を含む): 31299840

約数和(自身を除く): 10320957

約数列:

[1, 3, 9, 43, 129, 151, 359, 387, 453, 1077, 1359, 3231, 6493, 15437, 19479, 46311, 54209, 58437, 138933, 162627, 487881, 2330987, 6992961, 20978883]

約数ペア:

[(1, 20978883), (3, 6992961), (9, 2330987), (43, 487881), (129, 162627), (151, 138933), (359, 58437), (387, 54209), (453, 46311), (1077, 19479), (1359, 15437), (3231, 6493)]