21339405

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6679}}^1$

素因数の和:6761

約数の個数: 24

約数和(自身を含む): 37514880

約数和(自身を除く): 16175475

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6679, 20037, 33395, 60111, 100185, 300555, 474209, 1422627, 2371045, 4267881, 7113135, 21339405]

約数ペア:

[(1, 21339405), (3, 7113135), (5, 4267881), (9, 2371045), (15, 1422627), (45, 474209), (71, 300555), (213, 100185), (355, 60111), (639, 33395), (1065, 20037), (3195, 6679)]