20890389

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{12457}}^1$

素因数の和:12516

約数の個数: 16

約数和(自身を含む): 30696512

約数和(自身を除く): 9806123

約数列:

[1, 3, 13, 39, 43, 129, 559, 1677, 12457, 37371, 161941, 485823, 535651, 1606953, 6963463, 20890389]

約数ペア:

[(1, 20890389), (3, 6963463), (13, 1606953), (39, 535651), (43, 485823), (129, 161941), (559, 37371), (1677, 12457)]