21045017

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{503}}^1$

素因数の和:692

約数の個数: 16

約数和(自身を含む): 24837120

約数和(自身を除く): 3792103

約数列:

[1, 7, 43, 139, 301, 503, 973, 3521, 5977, 21629, 41839, 69917, 151403, 489419, 3006431, 21045017]

約数ペア:

[(1, 21045017), (7, 3006431), (43, 489419), (139, 151403), (301, 69917), (503, 41839), (973, 21629), (3521, 5977)]