21271165

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{13171}}^1$

素因数の和:13212

約数の個数: 16

約数和(自身を含む): 28451520

約数和(自身を除く): 7180355

約数列:

[1, 5, 17, 19, 85, 95, 323, 1615, 13171, 65855, 223907, 250249, 1119535, 1251245, 4254233, 21271165]

約数ペア:

[(1, 21271165), (5, 4254233), (17, 1251245), (19, 1119535), (85, 250249), (95, 223907), (323, 65855), (1615, 13171)]