20138755

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6323}}^1$

素因数の和:6355

約数の個数: 24

約数和(自身を含む): 30279312

約数和(自身を除く): 10140557

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6323, 31615, 44261, 82199, 221305, 309827, 410995, 575393, 1549135, 2876965, 4027751, 20138755]

約数ペア:

[(1, 20138755), (5, 4027751), (7, 2876965), (13, 1549135), (35, 575393), (49, 410995), (65, 309827), (91, 221305), (245, 82199), (455, 44261), (637, 31615), (3185, 6323)]