21049435

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20143}}^1$

素因数の和:20178

約数の個数: 16

約数和(自身を含む): 29007360

約数和(自身を除く): 7957925

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20143, 100715, 221573, 382717, 1107865, 1913585, 4209887, 21049435]

約数ペア:

[(1, 21049435), (5, 4209887), (11, 1913585), (19, 1107865), (55, 382717), (95, 221573), (209, 100715), (1045, 20143)]