19777121

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{3061}}^1$

素因数の和:3152

約数の個数: 16

約数和(自身を含む): 24691968

約数和(自身を除く): 4914847

約数列:

[1, 7, 13, 71, 91, 497, 923, 3061, 6461, 21427, 39793, 217331, 278551, 1521317, 2825303, 19777121]

約数ペア:

[(1, 19777121), (7, 2825303), (13, 1521317), (71, 278551), (91, 217331), (497, 39793), (923, 21427), (3061, 6461)]