128219987

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{467}}^1\times {\mathrm{643}}^1$

素因数の和:1178

約数の個数: 16

約数和(自身を含む): 149490432

約数和(自身を除く): 21270445

約数列:

[1, 7, 61, 427, 467, 643, 3269, 4501, 28487, 39223, 199409, 274561, 300281, 2101967, 18317141, 128219987]

約数ペア:

[(1, 128219987), (7, 18317141), (61, 2101967), (427, 300281), (467, 274561), (643, 199409), (3269, 39223), (4501, 28487)]