19728959

素因数分解:

${\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{197}}^1$

素因数の和:394

約数の個数: 16

約数和(自身を含む): 21640608

約数和(自身を除く): 1911649

約数列:

[1, 17, 43, 137, 197, 731, 2329, 3349, 5891, 8471, 26989, 100147, 144007, 458813, 1160527, 19728959]

約数ペア:

[(1, 19728959), (17, 1160527), (43, 458813), (137, 144007), (197, 100147), (731, 26989), (2329, 8471), (3349, 5891)]