20050121

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{2789}}^1$

素因数の和:2888

約数の個数: 16

約数和(自身を含む): 24998400

約数和(自身を除く): 4948279

約数列:

[1, 7, 13, 79, 91, 553, 1027, 2789, 7189, 19523, 36257, 220331, 253799, 1542317, 2864303, 20050121]

約数ペア:

[(1, 20050121), (7, 2864303), (13, 1542317), (79, 253799), (91, 220331), (553, 36257), (1027, 19523), (2789, 7189)]