21006305

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{13007}}^1$

素因数の和:13048

約数の個数: 16

約数和(自身を含む): 28097280

約数和(自身を除く): 7090975

約数列:

[1, 5, 17, 19, 85, 95, 323, 1615, 13007, 65035, 221119, 247133, 1105595, 1235665, 4201261, 21006305]

約数ペア:

[(1, 21006305), (5, 4201261), (17, 1235665), (19, 1105595), (85, 247133), (95, 221119), (323, 65035), (1615, 13007)]