21089815

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{3931}}^1$

素因数の和:4002

約数の個数: 16

約数和(自身を含む): 26894880

約数和(自身を除く): 5805065

約数列:

[1, 5, 29, 37, 145, 185, 1073, 3931, 5365, 19655, 113999, 145447, 569995, 727235, 4217963, 21089815]

約数ペア:

[(1, 21089815), (5, 4217963), (29, 727235), (37, 569995), (145, 145447), (185, 113999), (1073, 19655), (3931, 5365)]