21490729

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{521}}^1$

素因数の和:720

約数の個数: 16

約数和(自身を含む): 24554880

約数和(自身を除く): 3064151

約数列:

[1, 13, 19, 167, 247, 521, 2171, 3173, 6773, 9899, 41249, 87007, 128687, 1131091, 1653133, 21490729]

約数ペア:

[(1, 21490729), (13, 1653133), (19, 1131091), (167, 128687), (247, 87007), (521, 41249), (2171, 9899), (3173, 6773)]