20995239

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{1303}}^1$

素因数の和:1478

約数の個数: 16

約数和(自身を含む): 28917504

約数和(自身を除く): 7922265

約数列:

[1, 3, 41, 123, 131, 393, 1303, 3909, 5371, 16113, 53423, 160269, 170693, 512079, 6998413, 20995239]

約数ペア:

[(1, 20995239), (3, 6998413), (41, 512079), (123, 170693), (131, 160269), (393, 53423), (1303, 16113), (3909, 5371)]