21391683

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{1193}}^1$

素因数の和:1378

約数の個数: 16

約数和(自身を含む): 29420160

約数和(自身を除く): 8028477

約数列:

[1, 3, 43, 129, 139, 417, 1193, 3579, 5977, 17931, 51299, 153897, 165827, 497481, 7130561, 21391683]

約数ペア:

[(1, 21391683), (3, 7130561), (43, 497481), (129, 165827), (139, 153897), (417, 51299), (1193, 17931), (3579, 5977)]