20398168

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^2\times {\mathrm{197}}^1$

素因数の和:296

約数の個数: 48

約数和(自身を含む): 44977680

約数和(自身を除く): 24579512

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 86, 172, 197, 301, 344, 394, 602, 788, 1204, 1379, 1576, 1849, 2408, 2758, 3698, 5516, 7396, 8471, 11032, 12943, 14792, 16942, 25886, 33884, 51772, 59297, 67768, 103544, 118594, 237188, 364253, 474376, 728506, 1457012, 2549771, 2914024, 5099542, 10199084, 20398168]

約数ペア:

[(1, 20398168), (2, 10199084), (4, 5099542), (7, 2914024), (8, 2549771), (14, 1457012), (28, 728506), (43, 474376), (56, 364253), (86, 237188), (172, 118594), (197, 103544), (301, 67768), (344, 59297), (394, 51772), (602, 33884), (788, 25886), (1204, 16942), (1379, 14792), (1576, 12943), (1849, 11032), (2408, 8471), (2758, 7396), (3698, 5516)]