21391321

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{9461}}^1$

素因数の和:9504

約数の個数: 16

約数和(自身を含む): 27250560

約数和(自身を除く): 5859239

約数列:

[1, 7, 17, 19, 119, 133, 323, 2261, 9461, 66227, 160837, 179759, 1125859, 1258313, 3055903, 21391321]

約数ペア:

[(1, 21391321), (7, 3055903), (17, 1258313), (19, 1125859), (119, 179759), (133, 160837), (323, 66227), (2261, 9461)]