256778000

素因数分解:

$2^4\times 5^3\times {\mathrm{128389}}^1$

素因数の和:128412

約数の個数: 40

約数和(自身を含む): 620894040

約数和(自身を除く): 364116040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 128389, 256778, 513556, 641945, 1027112, 1283890, 2054224, 2567780, 3209725, 5135560, 6419450, 10271120, 12838900, 16048625, 25677800, 32097250, 51355600, 64194500, 128389000, 256778000]

約数ペア:

[(1, 256778000), (2, 128389000), (4, 64194500), (5, 51355600), (8, 32097250), (10, 25677800), (16, 16048625), (20, 12838900), (25, 10271120), (40, 6419450), (50, 5135560), (80, 3209725), (100, 2567780), (125, 2054224), (200, 1283890), (250, 1027112), (400, 641945), (500, 513556), (1000, 256778), (2000, 128389)]