20010445

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{199}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 31622400

約数和(自身を除く): 11611955

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 169, 199, 221, 455, 595, 845, 995, 1105, 1183, 1393, 1547, 2587, 2873, 3383, 5915, 6965, 7735, 12935, 14365, 16915, 18109, 20111, 23681, 33631, 43979, 90545, 100555, 118405, 168155, 219895, 235417, 307853, 571727, 1177085, 1539265, 2858635, 4002089, 20010445]

約数ペア:

[(1, 20010445), (5, 4002089), (7, 2858635), (13, 1539265), (17, 1177085), (35, 571727), (65, 307853), (85, 235417), (91, 219895), (119, 168155), (169, 118405), (199, 100555), (221, 90545), (455, 43979), (595, 33631), (845, 23681), (995, 20111), (1105, 18109), (1183, 16915), (1393, 14365), (1547, 12935), (2587, 7735), (2873, 6965), (3383, 5915)]