20890395

素因数分解:

$3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4259}}^1$

素因数の和:4379

約数の個数: 24

約数和(自身を含む): 36550800

約数和(自身を除く): 15660405

約数列:

[1, 3, 5, 9, 15, 45, 109, 327, 545, 981, 1635, 4259, 4905, 12777, 21295, 38331, 63885, 191655, 464231, 1392693, 2321155, 4178079, 6963465, 20890395]

約数ペア:

[(1, 20890395), (3, 6963465), (5, 4178079), (9, 2321155), (15, 1392693), (45, 464231), (109, 191655), (327, 63885), (545, 38331), (981, 21295), (1635, 12777), (4259, 4905)]