20542739

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{691}}^1$

素因数の和:866

約数の個数: 16

約数和(自身を含む): 24446976

約数和(自身を除く): 3904237

約数列:

[1, 7, 31, 137, 217, 691, 959, 4247, 4837, 21421, 29729, 94667, 149947, 662669, 2934677, 20542739]

約数ペア:

[(1, 20542739), (7, 2934677), (31, 662669), (137, 149947), (217, 94667), (691, 29729), (959, 21421), (4247, 4837)]