1644080

素因数分解:

$2^4\times 5^1\times {\mathrm{20551}}^1$

素因数の和:20564

約数の個数: 20

約数和(自身を含む): 3822672

約数和(自身を除く): 2178592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 20551, 41102, 82204, 102755, 164408, 205510, 328816, 411020, 822040, 1644080]

約数ペア:

[(1, 1644080), (2, 822040), (4, 411020), (5, 328816), (8, 205510), (10, 164408), (16, 102755), (20, 82204), (40, 41102), (80, 20551)]