20438978

素因数分解:

$2^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{2857}}^1$

素因数の和:2946

約数の個数: 24

約数和(自身を含む): 36165132

約数和(自身を除く): 15726154

約数列:

[1, 2, 7, 14, 49, 73, 98, 146, 511, 1022, 2857, 3577, 5714, 7154, 19999, 39998, 139993, 208561, 279986, 417122, 1459927, 2919854, 10219489, 20438978]

約数ペア:

[(1, 20438978), (2, 10219489), (7, 2919854), (14, 1459927), (49, 417122), (73, 279986), (98, 208561), (146, 139993), (511, 39998), (1022, 19999), (2857, 7154), (3577, 5714)]