20957937

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{997}}^1$

素因数の和:1038

約数の個数: 48

約数和(自身を含む): 38227392

約数和(自身を除く): 17269455

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 49, 77, 91, 143, 147, 231, 273, 429, 539, 637, 997, 1001, 1617, 1911, 2991, 3003, 6979, 7007, 10967, 12961, 20937, 21021, 32901, 38883, 48853, 76769, 90727, 142571, 146559, 230307, 272181, 427713, 537383, 635089, 997997, 1612149, 1905267, 2993991, 6985979, 20957937]

約数ペア:

[(1, 20957937), (3, 6985979), (7, 2993991), (11, 1905267), (13, 1612149), (21, 997997), (33, 635089), (39, 537383), (49, 427713), (77, 272181), (91, 230307), (143, 146559), (147, 142571), (231, 90727), (273, 76769), (429, 48853), (539, 38883), (637, 32901), (997, 21021), (1001, 20937), (1617, 12961), (1911, 10967), (2991, 7007), (3003, 6979)]