21208005

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5179}}^1$

素因数の和:5210

約数の個数: 48

約数和(自身を含む): 45252480

約数和(自身を除く): 24044475

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 63, 65, 91, 105, 117, 195, 273, 315, 455, 585, 819, 1365, 4095, 5179, 15537, 25895, 36253, 46611, 67327, 77685, 108759, 181265, 201981, 233055, 326277, 336635, 471289, 543795, 605943, 1009905, 1413867, 1631385, 2356445, 3029715, 4241601, 7069335, 21208005]

約数ペア:

[(1, 21208005), (3, 7069335), (5, 4241601), (7, 3029715), (9, 2356445), (13, 1631385), (15, 1413867), (21, 1009905), (35, 605943), (39, 543795), (45, 471289), (63, 336635), (65, 326277), (91, 233055), (105, 201981), (117, 181265), (195, 108759), (273, 77685), (315, 67327), (455, 46611), (585, 36253), (819, 25895), (1365, 15537), (4095, 5179)]