21388827

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{239}}^1\times {\mathrm{1297}}^1$

素因数の和:1562

約数の個数: 16

約数和(自身を含む): 29905920

約数和(自身を除く): 8517093

約数列:

[1, 3, 23, 69, 239, 717, 1297, 3891, 5497, 16491, 29831, 89493, 309983, 929949, 7129609, 21388827]

約数ペア:

[(1, 21388827), (3, 7129609), (23, 929949), (69, 309983), (239, 89493), (717, 29831), (1297, 16491), (3891, 5497)]