19640465

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7027}}^1$

素因数の和:7088

約数の個数: 16

約数和(自身を含む): 25975488

約数和(自身を除く): 6335023

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7027, 35135, 91351, 302161, 456755, 1510805, 3928093, 19640465]

約数ペア:

[(1, 19640465), (5, 3928093), (13, 1510805), (43, 456755), (65, 302161), (215, 91351), (559, 35135), (2795, 7027)]