20538800

素因数分解:

$2^4\times 5^2\times {\mathrm{51347}}^1$

素因数の和:51365

約数の個数: 30

約数和(自身を含む): 49345428

約数和(自身を除く): 28806628

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51347, 102694, 205388, 256735, 410776, 513470, 821552, 1026940, 1283675, 2053880, 2567350, 4107760, 5134700, 10269400, 20538800]

約数ペア:

[(1, 20538800), (2, 10269400), (4, 5134700), (5, 4107760), (8, 2567350), (10, 2053880), (16, 1283675), (20, 1026940), (25, 821552), (40, 513470), (50, 410776), (80, 256735), (100, 205388), (200, 102694), (400, 51347)]