21303500

素因数分解:

$2^2\times 5^3\times {\mathrm{137}}^1\times {\mathrm{311}}^1$

素因数の和:467

約数の個数: 48

約数和(自身を含む): 47017152

約数和(自身を除く): 25713652

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 137, 250, 274, 311, 500, 548, 622, 685, 1244, 1370, 1555, 2740, 3110, 3425, 6220, 6850, 7775, 13700, 15550, 17125, 31100, 34250, 38875, 42607, 68500, 77750, 85214, 155500, 170428, 213035, 426070, 852140, 1065175, 2130350, 4260700, 5325875, 10651750, 21303500]

約数ペア:

[(1, 21303500), (2, 10651750), (4, 5325875), (5, 4260700), (10, 2130350), (20, 1065175), (25, 852140), (50, 426070), (100, 213035), (125, 170428), (137, 155500), (250, 85214), (274, 77750), (311, 68500), (500, 42607), (548, 38875), (622, 34250), (685, 31100), (1244, 17125), (1370, 15550), (1555, 13700), (2740, 7775), (3110, 6850), (3425, 6220)]