21257929

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{5209}}^1$

素因数の和:5280

約数の個数: 16

約数和(自身を含む): 27008640

約数和(自身を除く): 5750711

約数列:

[1, 7, 11, 53, 77, 371, 583, 4081, 5209, 36463, 57299, 276077, 401093, 1932539, 3036847, 21257929]

約数ペア:

[(1, 21257929), (7, 3036847), (11, 1932539), (53, 401093), (77, 276077), (371, 57299), (583, 36463), (4081, 5209)]