25780400

素因数分解:

$2^4\times 5^2\times {\mathrm{64451}}^1$

素因数の和:64469

約数の個数: 30

約数和(自身を含む): 61938372

約数和(自身を除く): 36157972

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 64451, 128902, 257804, 322255, 515608, 644510, 1031216, 1289020, 1611275, 2578040, 3222550, 5156080, 6445100, 12890200, 25780400]

約数ペア:

[(1, 25780400), (2, 12890200), (4, 6445100), (5, 5156080), (8, 3222550), (10, 2578040), (16, 1611275), (20, 1289020), (25, 1031216), (40, 644510), (50, 515608), (80, 322255), (100, 257804), (200, 128902), (400, 64451)]