128021887

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{21491}}^1$

素因数の和:21558

約数の個数: 16

約数和(自身を含む): 156805632

約数和(自身を除く): 28783745

約数列:

[1, 7, 23, 37, 161, 259, 851, 5957, 21491, 150437, 494293, 795167, 3460051, 5566169, 18288841, 128021887]

約数ペア:

[(1, 128021887), (7, 18288841), (23, 5566169), (37, 3460051), (161, 795167), (259, 494293), (851, 150437), (5957, 21491)]