21690799

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{641}}^1$

素因数の和:810

約数の個数: 16

約数和(自身を含む): 24806880

約数和(自身を除く): 3116081

約数列:

[1, 13, 19, 137, 247, 641, 1781, 2603, 8333, 12179, 33839, 87817, 158327, 1141621, 1668523, 21690799]

約数ペア:

[(1, 21690799), (13, 1668523), (19, 1141621), (137, 158327), (247, 87817), (641, 33839), (1781, 12179), (2603, 8333)]