20399739

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1\times {\mathrm{971}}^1$

素因数の和:1170

約数の個数: 16

約数和(自身を含む): 27993600

約数和(自身を除く): 7593861

約数列:

[1, 3, 47, 141, 149, 447, 971, 2913, 7003, 21009, 45637, 136911, 144679, 434037, 6799913, 20399739]

約数ペア:

[(1, 20399739), (3, 6799913), (47, 434037), (141, 144679), (149, 136911), (447, 45637), (971, 21009), (2913, 7003)]