21991341

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{1373}}^1$

素因数の和:1676

約数の個数: 16

約数和(自身を含む): 30997440

約数和(自身を除く): 9006099

約数列:

[1, 3, 19, 57, 281, 843, 1373, 4119, 5339, 16017, 26087, 78261, 385813, 1157439, 7330447, 21991341]

約数ペア:

[(1, 21991341), (3, 7330447), (19, 1157439), (57, 385813), (281, 78261), (843, 26087), (1373, 16017), (4119, 5339)]