21894417

素因数分解:

$3^2\times {\mathrm{37}}^2\times {\mathrm{1777}}^1$

素因数の和:1857

約数の個数: 18

約数和(自身を含む): 32521398

約数和(自身を除く): 10626981

約数列:

[1, 3, 9, 37, 111, 333, 1369, 1777, 4107, 5331, 12321, 15993, 65749, 197247, 591741, 2432713, 7298139, 21894417]

約数ペア:

[(1, 21894417), (3, 7298139), (9, 2432713), (37, 591741), (111, 197247), (333, 65749), (1369, 15993), (1777, 12321), (4107, 5331)]