51280400

素因数分解:

$2^4\times 5^2\times {\mathrm{128201}}^1$

素因数の和:128219

約数の個数: 30

約数和(自身を含む): 123202122

約数和(自身を除く): 71921722

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 128201, 256402, 512804, 641005, 1025608, 1282010, 2051216, 2564020, 3205025, 5128040, 6410050, 10256080, 12820100, 25640200, 51280400]

約数ペア:

[(1, 51280400), (2, 25640200), (4, 12820100), (5, 10256080), (8, 6410050), (10, 5128040), (16, 3205025), (20, 2564020), (25, 2051216), (40, 1282010), (50, 1025608), (80, 641005), (100, 512804), (200, 256402), (400, 128201)]