21847021

素因数分解:

$7^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1\times {\mathrm{193}}^1$

素因数の和:460

約数の個数: 16

約数和(自身を含む): 25502464

約数和(自身を除く): 3655443

約数列:

[1, 7, 103, 157, 193, 721, 1099, 1351, 16171, 19879, 30301, 113197, 139153, 212107, 3121003, 21847021]

約数ペア:

[(1, 21847021), (7, 3121003), (103, 212107), (157, 139153), (193, 113197), (721, 30301), (1099, 19879), (1351, 16171)]