21181105

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20269}}^1$

素因数の和:20304

約数の個数: 16

約数和(自身を含む): 29188800

約数和(自身を除く): 8007695

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20269, 101345, 222959, 385111, 1114795, 1925555, 4236221, 21181105]

約数ペア:

[(1, 21181105), (5, 4236221), (11, 1925555), (19, 1114795), (55, 385111), (95, 222959), (209, 101345), (1045, 20269)]