21378200

素因数分解:

$2^3\times 5^2\times {\mathrm{139}}^1\times {\mathrm{769}}^1$

素因数の和:924

約数の個数: 48

約数和(自身を含む): 50127000

約数和(自身を除く): 28748800

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 139, 200, 278, 556, 695, 769, 1112, 1390, 1538, 2780, 3076, 3475, 3845, 5560, 6152, 6950, 7690, 13900, 15380, 19225, 27800, 30760, 38450, 76900, 106891, 153800, 213782, 427564, 534455, 855128, 1068910, 2137820, 2672275, 4275640, 5344550, 10689100, 21378200]

約数ペア:

[(1, 21378200), (2, 10689100), (4, 5344550), (5, 4275640), (8, 2672275), (10, 2137820), (20, 1068910), (25, 855128), (40, 534455), (50, 427564), (100, 213782), (139, 153800), (200, 106891), (278, 76900), (556, 38450), (695, 30760), (769, 27800), (1112, 19225), (1390, 15380), (1538, 13900), (2780, 7690), (3076, 6950), (3475, 6152), (3845, 5560)]