20807829500

素因数分解:

$2^2\times 5^3\times {\mathrm{197}}^1\times {\mathrm{211247}}^1$

素因数の和:211463

約数の個数: 48

約数和(自身を含む): 45675197568

約数和(自身を除く): 24867368068

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 197, 250, 394, 500, 788, 985, 1970, 3940, 4925, 9850, 19700, 24625, 49250, 98500, 211247, 422494, 844988, 1056235, 2112470, 4224940, 5281175, 10562350, 21124700, 26405875, 41615659, 52811750, 83231318, 105623500, 166462636, 208078295, 416156590, 832313180, 1040391475, 2080782950, 4161565900, 5201957375, 10403914750, 20807829500]

約数ペア:

[(1, 20807829500), (2, 10403914750), (4, 5201957375), (5, 4161565900), (10, 2080782950), (20, 1040391475), (25, 832313180), (50, 416156590), (100, 208078295), (125, 166462636), (197, 105623500), (250, 83231318), (394, 52811750), (500, 41615659), (788, 26405875), (985, 21124700), (1970, 10562350), (3940, 5281175), (4925, 4224940), (9850, 2112470), (19700, 1056235), (24625, 844988), (49250, 422494), (98500, 211247)]