80391760

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5101}}^1$

素因数の和:5311

約数の個数: 40

約数和(自身を含む): 187896456

約数和(自身を除く): 107504696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 5101, 7880, 10202, 15760, 20404, 25505, 40808, 51010, 81616, 102020, 204040, 408080, 1004897, 2009794, 4019588, 5024485, 8039176, 10048970, 16078352, 20097940, 40195880, 80391760]

約数ペア:

[(1, 80391760), (2, 40195880), (4, 20097940), (5, 16078352), (8, 10048970), (10, 8039176), (16, 5024485), (20, 4019588), (40, 2009794), (80, 1004897), (197, 408080), (394, 204040), (788, 102020), (985, 81616), (1576, 51010), (1970, 40808), (3152, 25505), (3940, 20404), (5101, 15760), (7880, 10202)]