20551895

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2657}}^1$

素因数の和:2699

約数の個数: 32

約数和(自身を含む): 32151168

約数和(自身を除く): 11599273

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 221, 455, 595, 1105, 1547, 2657, 7735, 13285, 18599, 34541, 45169, 92995, 172705, 225845, 241787, 316183, 587197, 1208935, 1580915, 2935985, 4110379, 20551895]

約数ペア:

[(1, 20551895), (5, 4110379), (7, 2935985), (13, 1580915), (17, 1208935), (35, 587197), (65, 316183), (85, 241787), (91, 225845), (119, 172705), (221, 92995), (455, 45169), (595, 34541), (1105, 18599), (1547, 13285), (2657, 7735)]