21788815

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{8269}}^1$

素因数の和:8322

約数の個数: 16

約数和(自身を含む): 28581120

約数和(自身を除く): 6792305

約数列:

[1, 5, 17, 31, 85, 155, 527, 2635, 8269, 41345, 140573, 256339, 702865, 1281695, 4357763, 21788815]

約数ペア:

[(1, 21788815), (5, 4357763), (17, 1281695), (31, 702865), (85, 256339), (155, 140573), (527, 41345), (2635, 8269)]