21211155

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{233}}^1$

素因数の和:285

約数の個数: 72

約数和(自身を含む): 44826912

約数和(自身を除く): 23615757

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 233, 255, 289, 315, 357, 595, 699, 765, 867, 1071, 1165, 1445, 1631, 1785, 2023, 2097, 2601, 3495, 3961, 4335, 4893, 5355, 6069, 8155, 10115, 10485, 11883, 13005, 14679, 18207, 19805, 24465, 27727, 30345, 35649, 59415, 67337, 73395, 83181, 91035, 138635, 178245, 202011, 249543, 336685, 415905, 471359, 606033, 1010055, 1247715, 1414077, 2356795, 3030165, 4242231, 7070385, 21211155]

約数ペア:

[(1, 21211155), (3, 7070385), (5, 4242231), (7, 3030165), (9, 2356795), (15, 1414077), (17, 1247715), (21, 1010055), (35, 606033), (45, 471359), (51, 415905), (63, 336685), (85, 249543), (105, 202011), (119, 178245), (153, 138635), (233, 91035), (255, 83181), (289, 73395), (315, 67337), (357, 59415), (595, 35649), (699, 30345), (765, 27727), (867, 24465), (1071, 19805), (1165, 18207), (1445, 14679), (1631, 13005), (1785, 11883), (2023, 10485), (2097, 10115), (2601, 8155), (3495, 6069), (3961, 5355), (4335, 4893)]