20870000

素因数分解:

$2^4\times 5^4\times {\mathrm{2087}}^1$

素因数の和:2115

約数の個数: 50

約数和(自身を含む): 50552568

約数和(自身を除く): 29682568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2087, 2500, 4174, 5000, 8348, 10000, 10435, 16696, 20870, 33392, 41740, 52175, 83480, 104350, 166960, 208700, 260875, 417400, 521750, 834800, 1043500, 1304375, 2087000, 2608750, 4174000, 5217500, 10435000, 20870000]

約数ペア:

[(1, 20870000), (2, 10435000), (4, 5217500), (5, 4174000), (8, 2608750), (10, 2087000), (16, 1304375), (20, 1043500), (25, 834800), (40, 521750), (50, 417400), (80, 260875), (100, 208700), (125, 166960), (200, 104350), (250, 83480), (400, 52175), (500, 41740), (625, 33392), (1000, 20870), (1250, 16696), (2000, 10435), (2087, 10000), (2500, 8348), (4174, 5000)]