21315965

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{3203}}^1$

素因数の和:3241

約数の個数: 16

約数和(自身を含む): 28143936

約数和(自身を除く): 6827971

約数列:

[1, 5, 11, 55, 121, 605, 1331, 3203, 6655, 16015, 35233, 176165, 387563, 1937815, 4263193, 21315965]

約数ペア:

[(1, 21315965), (5, 4263193), (11, 1937815), (55, 387563), (121, 176165), (605, 35233), (1331, 16015), (3203, 6655)]