21098987

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12203}}^1$

素因数の和:12242

約数の個数: 16

約数和(自身を含む): 27336960

約数和(自身を除く): 6237973

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12203, 85421, 158639, 231857, 1110473, 1622999, 3014141, 21098987]

約数ペア:

[(1, 21098987), (7, 3014141), (13, 1622999), (19, 1110473), (91, 231857), (133, 158639), (247, 85421), (1729, 12203)]