19956280

素因数分解:

$2^3\times 5^1\times {\mathrm{498907}}^1$

素因数の和:498918

約数の個数: 16

約数和(自身を含む): 44901720

約数和(自身を除く): 24945440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 498907, 997814, 1995628, 2494535, 3991256, 4989070, 9978140, 19956280]

約数ペア:

[(1, 19956280), (2, 9978140), (4, 4989070), (5, 3991256), (8, 2494535), (10, 1995628), (20, 997814), (40, 498907)]