209280239

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{431}}^1\times {\mathrm{977}}^1$

素因数の和:1486

約数の個数: 16

約数和(自身を含む): 243357696

約数和(自身を除く): 34077457

約数列:

[1, 7, 71, 431, 497, 977, 3017, 6839, 30601, 69367, 214207, 421087, 485569, 2947609, 29897177, 209280239]

約数ペア:

[(1, 209280239), (7, 29897177), (71, 2947609), (431, 485569), (497, 421087), (977, 214207), (3017, 69367), (6839, 30601)]