20565405

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{65287}}^1$

素因数の和:65305

約数の個数: 24

約数和(自身を含む): 40739712

約数和(自身を除く): 20174307

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 65287, 195861, 326435, 457009, 587583, 979305, 1371027, 2285045, 2937915, 4113081, 6855135, 20565405]

約数ペア:

[(1, 20565405), (3, 6855135), (5, 4113081), (7, 2937915), (9, 2285045), (15, 1371027), (21, 979305), (35, 587583), (45, 457009), (63, 326435), (105, 195861), (315, 65287)]