21377080

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4903}}^1$

素因数の和:5023

約数の個数: 32

約数和(自身を含む): 48549600

約数和(自身を除く): 27172520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4903, 9806, 19612, 24515, 39224, 49030, 98060, 196120, 534427, 1068854, 2137708, 2672135, 4275416, 5344270, 10688540, 21377080]

約数ペア:

[(1, 21377080), (2, 10688540), (4, 5344270), (5, 4275416), (8, 2672135), (10, 2137708), (20, 1068854), (40, 534427), (109, 196120), (218, 98060), (436, 49030), (545, 39224), (872, 24515), (1090, 19612), (2180, 9806), (4360, 4903)]