20987043

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{12979}}^1$

素因数の和:13007

約数の個数: 24

約数和(自身を含む): 35513280

約数和(自身を除く): 14526237

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 147, 231, 539, 1617, 12979, 38937, 90853, 142769, 272559, 428307, 635971, 999383, 1907913, 2998149, 6995681, 20987043]

約数ペア:

[(1, 20987043), (3, 6995681), (7, 2998149), (11, 1907913), (21, 999383), (33, 635971), (49, 428307), (77, 272559), (147, 142769), (231, 90853), (539, 38937), (1617, 12979)]