28389249

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{641}}^1$

素因数の和:710

約数の個数: 48

約数和(自身を含む): 50743680

約数和(自身を除く): 22354431

約数列:

[1, 3, 7, 9, 19, 21, 37, 57, 63, 111, 133, 171, 259, 333, 399, 641, 703, 777, 1197, 1923, 2109, 2331, 4487, 4921, 5769, 6327, 12179, 13461, 14763, 23717, 36537, 40383, 44289, 71151, 85253, 109611, 166019, 213453, 255759, 450623, 498057, 767277, 1351869, 1494171, 3154361, 4055607, 9463083, 28389249]

約数ペア:

[(1, 28389249), (3, 9463083), (7, 4055607), (9, 3154361), (19, 1494171), (21, 1351869), (37, 767277), (57, 498057), (63, 450623), (111, 255759), (133, 213453), (171, 166019), (259, 109611), (333, 85253), (399, 71151), (641, 44289), (703, 40383), (777, 36537), (1197, 23717), (1923, 14763), (2109, 13461), (2331, 12179), (4487, 6327), (4921, 5769)]