19891240

素因数分解:

$2^3\times 5^1\times {\mathrm{497281}}^1$

素因数の和:497292

約数の個数: 16

約数和(自身を含む): 44755380

約数和(自身を除く): 24864140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497281, 994562, 1989124, 2486405, 3978248, 4972810, 9945620, 19891240]

約数ペア:

[(1, 19891240), (2, 9945620), (4, 4972810), (5, 3978248), (8, 2486405), (10, 1989124), (20, 994562), (40, 497281)]