21780795

素因数分解:

$3^1\times 5^1\times {\mathrm{571}}^1\times {\mathrm{2543}}^1$

素因数の和:3122

約数の個数: 16

約数和(自身を含む): 34924032

約数和(自身を除く): 13143237

約数列:

[1, 3, 5, 15, 571, 1713, 2543, 2855, 7629, 8565, 12715, 38145, 1452053, 4356159, 7260265, 21780795]

約数ペア:

[(1, 21780795), (3, 7260265), (5, 4356159), (15, 1452053), (571, 38145), (1713, 12715), (2543, 8565), (2855, 7629)]