20684080

素因数分解:

$2^4\times 5^1\times {\mathrm{258551}}^1$

素因数の和:258564

約数の個数: 20

約数和(自身を含む): 48090672

約数和(自身を除く): 27406592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258551, 517102, 1034204, 1292755, 2068408, 2585510, 4136816, 5171020, 10342040, 20684080]

約数ペア:

[(1, 20684080), (2, 10342040), (4, 5171020), (5, 4136816), (8, 2585510), (10, 2068408), (16, 1292755), (20, 1034204), (40, 517102), (80, 258551)]