20421861

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{6883}}^1$

素因数の和:6952

約数の個数: 16

約数和(自身を含む): 29078016

約数和(自身を除く): 8656155

約数列:

[1, 3, 23, 43, 69, 129, 989, 2967, 6883, 20649, 158309, 295969, 474927, 887907, 6807287, 20421861]

約数ペア:

[(1, 20421861), (3, 6807287), (23, 887907), (43, 474927), (69, 295969), (129, 158309), (989, 20649), (2967, 6883)]