19840820

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1949}}^1$

素因数の和:2467

約数の個数: 24

約数和(自身を含む): 41769000

約数和(自身を除く): 21928180

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1949, 2036, 2545, 3898, 5090, 7796, 9745, 10180, 19490, 38980, 992041, 1984082, 3968164, 4960205, 9920410, 19840820]

約数ペア:

[(1, 19840820), (2, 9920410), (4, 4960205), (5, 3968164), (10, 1984082), (20, 992041), (509, 38980), (1018, 19490), (1949, 10180), (2036, 9745), (2545, 7796), (3898, 5090)]