20890595

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{19991}}^1$

素因数の和:20026

約数の個数: 16

約数和(自身を含む): 28788480

約数和(自身を除く): 7897885

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 19991, 99955, 219901, 379829, 1099505, 1899145, 4178119, 20890595]

約数ペア:

[(1, 20890595), (5, 4178119), (11, 1899145), (19, 1099505), (55, 379829), (95, 219901), (209, 99955), (1045, 19991)]