2018840240

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{128099}}^1$

素因数の和:128309

約数の個数: 40

約数和(自身を含む): 4717666800

約数和(自身を除く): 2698826560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 7880, 15760, 128099, 256198, 512396, 640495, 1024792, 1280990, 2049584, 2561980, 5123960, 10247920, 25235503, 50471006, 100942012, 126177515, 201884024, 252355030, 403768048, 504710060, 1009420120, 2018840240]

約数ペア:

[(1, 2018840240), (2, 1009420120), (4, 504710060), (5, 403768048), (8, 252355030), (10, 201884024), (16, 126177515), (20, 100942012), (40, 50471006), (80, 25235503), (197, 10247920), (394, 5123960), (788, 2561980), (985, 2049584), (1576, 1280990), (1970, 1024792), (3152, 640495), (3940, 512396), (7880, 256198), (15760, 128099)]