21021765

素因数分解:

$3^1\times 5^1\times {\mathrm{631}}^1\times {\mathrm{2221}}^1$

素因数の和:2860

約数の個数: 16

約数和(自身を含む): 33703296

約数和(自身を除く): 12681531

約数列:

[1, 3, 5, 15, 631, 1893, 2221, 3155, 6663, 9465, 11105, 33315, 1401451, 4204353, 7007255, 21021765]

約数ペア:

[(1, 21021765), (3, 7007255), (5, 4204353), (15, 1401451), (631, 33315), (1893, 11105), (2221, 9465), (3155, 6663)]