21640479

素因数分解:

$3^1\times 7^1\times {\mathrm{661}}^1\times {\mathrm{1559}}^1$

素因数の和:2230

約数の個数: 16

約数和(自身を含む): 33047040

約数和(自身を除く): 11406561

約数列:

[1, 3, 7, 21, 661, 1559, 1983, 4627, 4677, 10913, 13881, 32739, 1030499, 3091497, 7213493, 21640479]

約数ペア:

[(1, 21640479), (3, 7213493), (7, 3091497), (21, 1030499), (661, 32739), (1559, 13881), (1983, 10913), (4627, 4677)]