21310785

素因数分解:

$3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3407}}^1$

素因数の和:3557

約数の個数: 24

約数和(自身を含む): 37215360

約数和(自身を除く): 15904575

約数列:

[1, 3, 5, 9, 15, 45, 139, 417, 695, 1251, 2085, 3407, 6255, 10221, 17035, 30663, 51105, 153315, 473573, 1420719, 2367865, 4262157, 7103595, 21310785]

約数ペア:

[(1, 21310785), (3, 7103595), (5, 4262157), (9, 2367865), (15, 1420719), (45, 473573), (139, 153315), (417, 51105), (695, 30663), (1251, 17035), (2085, 10221), (3407, 6255)]