211686713

素因数分解:

$7^2\times {\mathrm{71}}^2\times {\mathrm{857}}^1$

素因数の和:1013

約数の個数: 18

約数和(自身を含む): 250056378

約数和(自身を除く): 38369665

約数列:

[1, 7, 49, 71, 497, 857, 3479, 5041, 5999, 35287, 41993, 60847, 247009, 425929, 2981503, 4320137, 30240959, 211686713]

約数ペア:

[(1, 211686713), (7, 30240959), (49, 4320137), (71, 2981503), (497, 425929), (857, 247009), (3479, 60847), (5041, 41993), (5999, 35287)]