21075891

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1\times {\mathrm{821}}^1$

素因数の和:1066

約数の個数: 16

約数和(自身を含む): 28934400

約数和(自身を除く): 7858509

約数列:

[1, 3, 43, 129, 199, 597, 821, 2463, 8557, 25671, 35303, 105909, 163379, 490137, 7025297, 21075891]

約数ペア:

[(1, 21075891), (3, 7025297), (43, 490137), (129, 163379), (199, 105909), (597, 35303), (821, 25671), (2463, 8557)]