21807051

素因数分解:

$3^1\times 7^1\times {\mathrm{661}}^1\times {\mathrm{1571}}^1$

素因数の和:2242

約数の個数: 16

約数和(自身を含む): 33301248

約数和(自身を除く): 11494197

約数列:

[1, 3, 7, 21, 661, 1571, 1983, 4627, 4713, 10997, 13881, 32991, 1038431, 3115293, 7269017, 21807051]

約数ペア:

[(1, 21807051), (3, 7269017), (7, 3115293), (21, 1038431), (661, 32991), (1571, 13881), (1983, 10997), (4627, 4713)]