20396515

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{10433}}^1$

素因数の和:10478

約数の個数: 16

約数和(自身を含む): 27044928

約数和(自身を除く): 6648413

約数列:

[1, 5, 17, 23, 85, 115, 391, 1955, 10433, 52165, 177361, 239959, 886805, 1199795, 4079303, 20396515]

約数ペア:

[(1, 20396515), (5, 4079303), (17, 1199795), (23, 886805), (85, 239959), (115, 177361), (391, 52165), (1955, 10433)]