20385855

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{64717}}^1$

素因数の和:64735

約数の個数: 24

約数和(自身を含む): 40384032

約数和(自身を除く): 19998177

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 64717, 194151, 323585, 453019, 582453, 970755, 1359057, 2265095, 2912265, 4077171, 6795285, 20385855]

約数ペア:

[(1, 20385855), (3, 6795285), (5, 4077171), (7, 2912265), (9, 2265095), (15, 1359057), (21, 970755), (35, 582453), (45, 453019), (63, 323585), (105, 194151), (315, 64717)]