21708267

素因数分解:

$3^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{9661}}^1$

素因数の和:9778

約数の個数: 16

約数和(自身を含む): 33391872

約数和(自身を除く): 11683605

約数列:

[1, 3, 7, 21, 107, 321, 749, 2247, 9661, 28983, 67627, 202881, 1033727, 3101181, 7236089, 21708267]

約数ペア:

[(1, 21708267), (3, 7236089), (7, 3101181), (21, 1033727), (107, 202881), (321, 67627), (749, 28983), (2247, 9661)]