21031465

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2719}}^1$

素因数の和:2761

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 11869655

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 221, 455, 595, 1105, 1547, 2719, 7735, 13595, 19033, 35347, 46223, 95165, 176735, 231115, 247429, 323561, 600899, 1237145, 1617805, 3004495, 4206293, 21031465]

約数ペア:

[(1, 21031465), (5, 4206293), (7, 3004495), (13, 1617805), (17, 1237145), (35, 600899), (65, 323561), (85, 247429), (91, 231115), (119, 176735), (221, 95165), (455, 46223), (595, 35347), (1105, 19033), (1547, 13595), (2719, 7735)]