21268247

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{21247}}^1$

素因数の和:21278

約数の個数: 16

約数和(自身を含む): 28557312

約数和(自身を除く): 7289065

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 21247, 148729, 233717, 276211, 1636019, 1933477, 3038321, 21268247]

約数ペア:

[(1, 21268247), (7, 3038321), (11, 1933477), (13, 1636019), (77, 276211), (91, 233717), (143, 148729), (1001, 21247)]