21787600

素因数分解:

$2^4\times 5^2\times {\mathrm{54469}}^1$

素因数の和:54487

約数の個数: 30

約数和(自身を含む): 52345670

約数和(自身を除く): 30558070

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 54469, 108938, 217876, 272345, 435752, 544690, 871504, 1089380, 1361725, 2178760, 2723450, 4357520, 5446900, 10893800, 21787600]

約数ペア:

[(1, 21787600), (2, 10893800), (4, 5446900), (5, 4357520), (8, 2723450), (10, 2178760), (16, 1361725), (20, 1089380), (25, 871504), (40, 544690), (50, 435752), (80, 272345), (100, 217876), (200, 108938), (400, 54469)]