21981576

素因数分解:

$2^3\times 3^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{251}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 57153600

約数和(自身を除く): 35172024

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 41, 82, 89, 123, 164, 178, 246, 251, 267, 328, 356, 492, 502, 534, 712, 753, 984, 1004, 1068, 1506, 2008, 2136, 3012, 3649, 6024, 7298, 10291, 10947, 14596, 20582, 21894, 22339, 29192, 30873, 41164, 43788, 44678, 61746, 67017, 82328, 87576, 89356, 123492, 134034, 178712, 246984, 268068, 536136, 915899, 1831798, 2747697, 3663596, 5495394, 7327192, 10990788, 21981576]

約数ペア:

[(1, 21981576), (2, 10990788), (3, 7327192), (4, 5495394), (6, 3663596), (8, 2747697), (12, 1831798), (24, 915899), (41, 536136), (82, 268068), (89, 246984), (123, 178712), (164, 134034), (178, 123492), (246, 89356), (251, 87576), (267, 82328), (328, 67017), (356, 61746), (492, 44678), (502, 43788), (534, 41164), (712, 30873), (753, 29192), (984, 22339), (1004, 21894), (1068, 20582), (1506, 14596), (2008, 10947), (2136, 10291), (3012, 7298), (3649, 6024)]