20496400

素因数分解:

$2^4\times 5^2\times {\mathrm{51241}}^1$

素因数の和:51259

約数の個数: 30

約数和(自身を含む): 49243562

約数和(自身を除く): 28747162

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51241, 102482, 204964, 256205, 409928, 512410, 819856, 1024820, 1281025, 2049640, 2562050, 4099280, 5124100, 10248200, 20496400]

約数ペア:

[(1, 20496400), (2, 10248200), (4, 5124100), (5, 4099280), (8, 2562050), (10, 2049640), (16, 1281025), (20, 1024820), (25, 819856), (40, 512410), (50, 409928), (80, 256205), (100, 204964), (200, 102482), (400, 51241)]