19891000

素因数分解:

$2^3\times 5^3\times {\mathrm{19891}}^1$

素因数の和:19912

約数の個数: 32

約数和(自身を含む): 46547280

約数和(自身を除く): 26656280

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 19891, 39782, 79564, 99455, 159128, 198910, 397820, 497275, 795640, 994550, 1989100, 2486375, 3978200, 4972750, 9945500, 19891000]

約数ペア:

[(1, 19891000), (2, 9945500), (4, 4972750), (5, 3978200), (8, 2486375), (10, 1989100), (20, 994550), (25, 795640), (40, 497275), (50, 397820), (100, 198910), (125, 159128), (200, 99455), (250, 79564), (500, 39782), (1000, 19891)]