21380206

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{11971}}^1$

素因数の和:12039

約数の個数: 16

約数和(自身を含む): 34479360

約数和(自身を除く): 13099154

約数列:

[1, 2, 19, 38, 47, 94, 893, 1786, 11971, 23942, 227449, 454898, 562637, 1125274, 10690103, 21380206]

約数ペア:

[(1, 21380206), (2, 10690103), (19, 1125274), (38, 562637), (47, 454898), (94, 227449), (893, 23942), (1786, 11971)]