21671391

素因数分解:

$3^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{5347}}^1$

素因数の和:5550

約数の個数: 16

約数和(自身を含む): 33200384

約数和(自身を除く): 11528993

約数列:

[1, 3, 7, 21, 193, 579, 1351, 4053, 5347, 16041, 37429, 112287, 1031971, 3095913, 7223797, 21671391]

約数ペア:

[(1, 21671391), (3, 7223797), (7, 3095913), (21, 1031971), (193, 112287), (579, 37429), (1351, 16041), (4053, 5347)]