19988500

素因数分解:

$2^2\times 5^3\times 7^1\times {\mathrm{5711}}^1$

素因数の和:5737

約数の個数: 48

約数和(自身を含む): 49900032

約数和(自身を除く): 29911532

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 125, 140, 175, 250, 350, 500, 700, 875, 1750, 3500, 5711, 11422, 22844, 28555, 39977, 57110, 79954, 114220, 142775, 159908, 199885, 285550, 399770, 571100, 713875, 799540, 999425, 1427750, 1998850, 2855500, 3997700, 4997125, 9994250, 19988500]

約数ペア:

[(1, 19988500), (2, 9994250), (4, 4997125), (5, 3997700), (7, 2855500), (10, 1998850), (14, 1427750), (20, 999425), (25, 799540), (28, 713875), (35, 571100), (50, 399770), (70, 285550), (100, 199885), (125, 159908), (140, 142775), (175, 114220), (250, 79954), (350, 57110), (500, 39977), (700, 28555), (875, 22844), (1750, 11422), (3500, 5711)]