20971335

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{271}}^1$

素因数の和:364

約数の個数: 64

約数和(自身を含む): 42614784

約数和(自身を除く): 21643449

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 67, 77, 105, 165, 201, 231, 271, 335, 385, 469, 737, 813, 1005, 1155, 1355, 1407, 1897, 2211, 2345, 2981, 3685, 4065, 5159, 5691, 7035, 8943, 9485, 11055, 14905, 15477, 18157, 20867, 25795, 28455, 44715, 54471, 62601, 77385, 90785, 104335, 127099, 199727, 272355, 313005, 381297, 599181, 635495, 998635, 1398089, 1906485, 2995905, 4194267, 6990445, 20971335]

約数ペア:

[(1, 20971335), (3, 6990445), (5, 4194267), (7, 2995905), (11, 1906485), (15, 1398089), (21, 998635), (33, 635495), (35, 599181), (55, 381297), (67, 313005), (77, 272355), (105, 199727), (165, 127099), (201, 104335), (231, 90785), (271, 77385), (335, 62601), (385, 54471), (469, 44715), (737, 28455), (813, 25795), (1005, 20867), (1155, 18157), (1355, 15477), (1407, 14905), (1897, 11055), (2211, 9485), (2345, 8943), (2981, 7035), (3685, 5691), (4065, 5159)]