20938700

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{5107}}^1$

素因数の和:5162

約数の個数: 36

約数和(自身を含む): 46554312

約数和(自身を除く): 25615612

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 5107, 10214, 20428, 25535, 51070, 102140, 127675, 209387, 255350, 418774, 510700, 837548, 1046935, 2093870, 4187740, 5234675, 10469350, 20938700]

約数ペア:

[(1, 20938700), (2, 10469350), (4, 5234675), (5, 4187740), (10, 2093870), (20, 1046935), (25, 837548), (41, 510700), (50, 418774), (82, 255350), (100, 209387), (164, 127675), (205, 102140), (410, 51070), (820, 25535), (1025, 20428), (2050, 10214), (4100, 5107)]