257621

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1$

素因数の和:188

約数の個数: 16

約数和(自身を含む): 336000

約数和(自身を除く): 78379

約数列:

[1, 7, 13, 19, 91, 133, 149, 247, 1043, 1729, 1937, 2831, 13559, 19817, 36803, 257621]

約数ペア:

[(1, 257621), (7, 36803), (13, 19817), (19, 13559), (91, 2831), (133, 1937), (149, 1729), (247, 1043)]