19891880

素因数分解:

$2^3\times 5^1\times {\mathrm{497297}}^1$

素因数の和:497308

約数の個数: 16

約数和(自身を含む): 44756820

約数和(自身を除く): 24864940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497297, 994594, 1989188, 2486485, 3978376, 4972970, 9945940, 19891880]

約数ペア:

[(1, 19891880), (2, 9945940), (4, 4972970), (5, 3978376), (8, 2486485), (10, 1989188), (20, 994594), (40, 497297)]