18856820

素因数分解:

$2^2\times 5^1\times {\mathrm{971}}^2$

素因数の和:1951

約数の個数: 18

約数和(自身を含む): 39640146

約数和(自身を除く): 20783326

約数列:

[1, 2, 4, 5, 10, 20, 971, 1942, 3884, 4855, 9710, 19420, 942841, 1885682, 3771364, 4714205, 9428410, 18856820]

約数ペア:

[(1, 18856820), (2, 9428410), (4, 4714205), (5, 3771364), (10, 1885682), (20, 942841), (971, 19420), (1942, 9710), (3884, 4855)]