21000826

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 41803776

約数和(自身を除く): 20802950

約数列:

[1, 2, 7, 11, 14, 22, 31, 53, 62, 77, 83, 106, 154, 166, 217, 341, 371, 434, 581, 583, 682, 742, 913, 1162, 1166, 1643, 1826, 2387, 2573, 3286, 4081, 4399, 4774, 5146, 6391, 8162, 8798, 11501, 12782, 18011, 18073, 23002, 28303, 30793, 36022, 36146, 48389, 56606, 61586, 96778, 126511, 136369, 198121, 253022, 272738, 338723, 396242, 677446, 954583, 1500059, 1909166, 3000118, 10500413, 21000826]

約数ペア:

[(1, 21000826), (2, 10500413), (7, 3000118), (11, 1909166), (14, 1500059), (22, 954583), (31, 677446), (53, 396242), (62, 338723), (77, 272738), (83, 253022), (106, 198121), (154, 136369), (166, 126511), (217, 96778), (341, 61586), (371, 56606), (434, 48389), (581, 36146), (583, 36022), (682, 30793), (742, 28303), (913, 23002), (1162, 18073), (1166, 18011), (1643, 12782), (1826, 11501), (2387, 8798), (2573, 8162), (3286, 6391), (4081, 5146), (4399, 4774)]