21189280

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{18919}}^1$

素因数の和:18941

約数の個数: 48

約数和(自身を含む): 57214080

約数和(自身を除く): 36024800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 18919, 37838, 75676, 94595, 132433, 151352, 189190, 264866, 302704, 378380, 529732, 605408, 662165, 756760, 1059464, 1324330, 1513520, 2118928, 2648660, 3027040, 4237856, 5297320, 10594640, 21189280]

約数ペア:

[(1, 21189280), (2, 10594640), (4, 5297320), (5, 4237856), (7, 3027040), (8, 2648660), (10, 2118928), (14, 1513520), (16, 1324330), (20, 1059464), (28, 756760), (32, 662165), (35, 605408), (40, 529732), (56, 378380), (70, 302704), (80, 264866), (112, 189190), (140, 151352), (160, 132433), (224, 94595), (280, 75676), (560, 37838), (1120, 18919)]