209207999

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{409}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 290535840

約数和(自身を除く): 81327841

約数列:

[1, 7, 11, 13, 49, 73, 77, 91, 143, 409, 511, 539, 637, 803, 949, 1001, 2863, 3577, 4499, 5317, 5621, 6643, 7007, 10439, 20041, 29857, 31493, 37219, 39347, 46501, 58487, 73073, 208999, 220451, 260533, 328427, 388141, 409409, 511511, 1462993, 2298989, 2716987, 2865863, 4269551, 16092923, 19018909, 29886857, 209207999]

約数ペア:

[(1, 209207999), (7, 29886857), (11, 19018909), (13, 16092923), (49, 4269551), (73, 2865863), (77, 2716987), (91, 2298989), (143, 1462993), (409, 511511), (511, 409409), (539, 388141), (637, 328427), (803, 260533), (949, 220451), (1001, 208999), (2863, 73073), (3577, 58487), (4499, 46501), (5317, 39347), (5621, 37219), (6643, 31493), (7007, 29857), (10439, 20041)]