20513421

素因数分解:

$3^2\times {\mathrm{127}}^1\times {\mathrm{131}}^1\times {\mathrm{137}}^1$

素因数の和:401

約数の個数: 24

約数和(自身を含む): 30311424

約数和(自身を除く): 9798003

約数列:

[1, 3, 9, 127, 131, 137, 381, 393, 411, 1143, 1179, 1233, 16637, 17399, 17947, 49911, 52197, 53841, 149733, 156591, 161523, 2279269, 6837807, 20513421]

約数ペア:

[(1, 20513421), (3, 6837807), (9, 2279269), (127, 161523), (131, 156591), (137, 149733), (381, 53841), (393, 52197), (411, 49911), (1143, 17947), (1179, 17399), (1233, 16637)]