20215321

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{241}}^1\times {\mathrm{521}}^1$

素因数の和:792

約数の個数: 16

約数和(自身を含む): 24254208

約数和(自身を除く): 4038887

約数列:

[1, 7, 23, 161, 241, 521, 1687, 3647, 5543, 11983, 38801, 83881, 125561, 878927, 2887903, 20215321]

約数ペア:

[(1, 20215321), (7, 2887903), (23, 878927), (161, 125561), (241, 83881), (521, 38801), (1687, 11983), (3647, 5543)]