28720405

素因数分解:

$5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{7669}}^1$

素因数の和:7788

約数の個数: 16

約数和(自身を含む): 39761280

約数和(自身を除く): 11040875

約数列:

[1, 5, 7, 35, 107, 535, 749, 3745, 7669, 38345, 53683, 268415, 820583, 4102915, 5744081, 28720405]

約数ペア:

[(1, 28720405), (5, 5744081), (7, 4102915), (35, 820583), (107, 268415), (535, 53683), (749, 38345), (3745, 7669)]