20819755

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12211}}^1$

素因数の和:12258

約数の個数: 16

約数和(自身を含む): 28136448

約数和(自身を除く): 7316693

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12211, 61055, 134321, 378541, 671605, 1892705, 4163951, 20819755]

約数ペア:

[(1, 20819755), (5, 4163951), (11, 1892705), (31, 671605), (55, 378541), (155, 134321), (341, 61055), (1705, 12211)]