21541025

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{7121}}^1$

素因数の和:7153

約数の個数: 18

約数和(自身を含む): 29364006

約数和(自身を除く): 7822981

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 3025, 7121, 35605, 78331, 178025, 391655, 861641, 1958275, 4308205, 21541025]

約数ペア:

[(1, 21541025), (5, 4308205), (11, 1958275), (25, 861641), (55, 391655), (121, 178025), (275, 78331), (605, 35605), (3025, 7121)]