21253892

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43913}}^1$

素因数の和:43939

約数の個数: 18

約数和(自身を含む): 40883934

約数和(自身を除く): 19630042

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43913, 87826, 175652, 483043, 966086, 1932172, 5313473, 10626946, 21253892]

約数ペア:

[(1, 21253892), (2, 10626946), (4, 5313473), (11, 1932172), (22, 966086), (44, 483043), (121, 175652), (242, 87826), (484, 43913)]