19966921

素因数分解:

${\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1553}}^1$

素因数の和:1632

約数の個数: 16

約数和(自身を含む): 22974336

約数和(自身を除く): 3007415

約数列:

[1, 13, 23, 43, 299, 559, 989, 1553, 12857, 20189, 35719, 66779, 464347, 868127, 1535917, 19966921]

約数ペア:

[(1, 19966921), (13, 1535917), (23, 868127), (43, 464347), (299, 66779), (559, 35719), (989, 20189), (1553, 12857)]