21167795

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{941}}^1$

素因数の和:1366

約数の個数: 16

約数和(自身を含む): 27807840

約数和(自身を除く): 6640045

約数列:

[1, 5, 11, 55, 409, 941, 2045, 4499, 4705, 10351, 22495, 51755, 384869, 1924345, 4233559, 21167795]

約数ペア:

[(1, 21167795), (5, 4233559), (11, 1924345), (55, 384869), (409, 51755), (941, 22495), (2045, 10351), (4499, 4705)]