19981549

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{1571}}^1$

素因数の和:1680

約数の個数: 16

約数和(自身を含む): 24145920

約数和(自身を除く): 4164371

約数列:

[1, 7, 23, 79, 161, 553, 1571, 1817, 10997, 12719, 36133, 124109, 252931, 868763, 2854507, 19981549]

約数ペア:

[(1, 19981549), (7, 2854507), (23, 868763), (79, 252931), (161, 124109), (553, 36133), (1571, 12719), (1817, 10997)]