21509901

素因数分解:

$3^3\times 7^1\times {\mathrm{113809}}^1$

素因数の和:113825

約数の個数: 16

約数和(自身を含む): 36419200

約数和(自身を除く): 14909299

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 113809, 341427, 796663, 1024281, 2389989, 3072843, 7169967, 21509901]

約数ペア:

[(1, 21509901), (3, 7169967), (7, 3072843), (9, 2389989), (21, 1024281), (27, 796663), (63, 341427), (189, 113809)]