21681303

素因数分解:

$3^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{9649}}^1$

素因数の和:9766

約数の個数: 16

約数和(自身を含む): 33350400

約数和(自身を除く): 11669097

約数列:

[1, 3, 7, 21, 107, 321, 749, 2247, 9649, 28947, 67543, 202629, 1032443, 3097329, 7227101, 21681303]

約数ペア:

[(1, 21681303), (3, 7227101), (7, 3097329), (21, 1032443), (107, 202629), (321, 67543), (749, 28947), (2247, 9649)]