20807913

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{31963}}^1$

素因数の和:32004

約数の個数: 16

約数和(自身を含む): 32731136

約数和(自身を除く): 11923223

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 31963, 95889, 223741, 671223, 990853, 2972559, 6935971, 20807913]

約数ペア:

[(1, 20807913), (3, 6935971), (7, 2972559), (21, 990853), (31, 671223), (93, 223741), (217, 95889), (651, 31963)]