19956016

素因数分解:

$2^4\times {\mathrm{131}}^1\times {\mathrm{9521}}^1$

素因数の和:9660

約数の個数: 20

約数和(自身を含む): 38964024

約数和(自身を除く): 19008008

約数列:

[1, 2, 4, 8, 16, 131, 262, 524, 1048, 2096, 9521, 19042, 38084, 76168, 152336, 1247251, 2494502, 4989004, 9978008, 19956016]

約数ペア:

[(1, 19956016), (2, 9978008), (4, 4989004), (8, 2494502), (16, 1247251), (131, 152336), (262, 76168), (524, 38084), (1048, 19042), (2096, 9521)]