20408885

素因数分解:

$5^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{1499}}^1$

素因数の和:1900

約数の個数: 16

約数和(自身を含む): 28080000

約数和(自身を除く): 7671115

約数列:

[1, 5, 7, 35, 389, 1499, 1945, 2723, 7495, 10493, 13615, 52465, 583111, 2915555, 4081777, 20408885]

約数ペア:

[(1, 20408885), (5, 4081777), (7, 2915555), (35, 583111), (389, 52465), (1499, 13615), (1945, 10493), (2723, 7495)]