21397838

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:213

約数の個数: 64

約数和(自身を含む): 43130880

約数和(自身を除く): 21733042

約数列:

[1, 2, 7, 11, 14, 19, 22, 38, 71, 77, 103, 133, 142, 154, 206, 209, 266, 418, 497, 721, 781, 994, 1133, 1349, 1442, 1463, 1562, 1957, 2266, 2698, 2926, 3914, 5467, 7313, 7931, 9443, 10934, 13699, 14626, 14839, 15862, 18886, 21527, 27398, 29678, 43054, 51191, 80443, 102382, 103873, 138947, 150689, 160886, 207746, 277894, 301378, 563101, 972629, 1126202, 1528417, 1945258, 3056834, 10698919, 21397838]

約数ペア:

[(1, 21397838), (2, 10698919), (7, 3056834), (11, 1945258), (14, 1528417), (19, 1126202), (22, 972629), (38, 563101), (71, 301378), (77, 277894), (103, 207746), (133, 160886), (142, 150689), (154, 138947), (206, 103873), (209, 102382), (266, 80443), (418, 51191), (497, 43054), (721, 29678), (781, 27398), (994, 21527), (1133, 18886), (1349, 15862), (1442, 14839), (1463, 14626), (1562, 13699), (1957, 10934), (2266, 9443), (2698, 7931), (2926, 7313), (3914, 5467)]