21357945

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{233}}^1$

素因数の和:351

約数の個数: 64

約数和(自身を含む): 44029440

約数和(自身を除く): 22671495

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 97, 105, 135, 189, 233, 291, 315, 485, 679, 699, 873, 945, 1165, 1455, 1631, 2037, 2097, 2619, 3395, 3495, 4365, 4893, 6111, 6291, 8155, 10185, 10485, 13095, 14679, 18333, 22601, 24465, 30555, 31455, 44037, 67803, 73395, 91665, 113005, 158207, 203409, 220185, 339015, 474621, 610227, 791035, 1017045, 1423863, 2373105, 3051135, 4271589, 7119315, 21357945]

約数ペア:

[(1, 21357945), (3, 7119315), (5, 4271589), (7, 3051135), (9, 2373105), (15, 1423863), (21, 1017045), (27, 791035), (35, 610227), (45, 474621), (63, 339015), (97, 220185), (105, 203409), (135, 158207), (189, 113005), (233, 91665), (291, 73395), (315, 67803), (485, 44037), (679, 31455), (699, 30555), (873, 24465), (945, 22601), (1165, 18333), (1455, 14679), (1631, 13095), (2037, 10485), (2097, 10185), (2619, 8155), (3395, 6291), (3495, 6111), (4365, 4893)]