20420239

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{227}}^1$

素因数の和:486

約数の個数: 16

約数和(自身を含む): 23901696

約数和(自身を除く): 3481457

約数列:

[1, 7, 71, 181, 227, 497, 1267, 1589, 12851, 16117, 41087, 89957, 112819, 287609, 2917177, 20420239]

約数ペア:

[(1, 20420239), (7, 2917177), (71, 287609), (181, 112819), (227, 89957), (497, 41087), (1267, 16117), (1589, 12851)]