18920675

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{653}}^1$

素因数の和:743

約数の個数: 24

約数和(自身を含む): 25139760

約数和(自身を除く): 6219085

約数列:

[1, 5, 19, 25, 61, 95, 305, 475, 653, 1159, 1525, 3265, 5795, 12407, 16325, 28975, 39833, 62035, 199165, 310175, 756827, 995825, 3784135, 18920675]

約数ペア:

[(1, 18920675), (5, 3784135), (19, 995825), (25, 756827), (61, 310175), (95, 199165), (305, 62035), (475, 39833), (653, 28975), (1159, 16325), (1525, 12407), (3265, 5795)]