278000

素因数分解:

$2^4\times 5^3\times {\mathrm{139}}^1$

素因数の和:162

約数の個数: 40

約数和(自身を含む): 677040

約数和(自身を除く): 399040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 139, 200, 250, 278, 400, 500, 556, 695, 1000, 1112, 1390, 2000, 2224, 2780, 3475, 5560, 6950, 11120, 13900, 17375, 27800, 34750, 55600, 69500, 139000, 278000]

約数ペア:

[(1, 278000), (2, 139000), (4, 69500), (5, 55600), (8, 34750), (10, 27800), (16, 17375), (20, 13900), (25, 11120), (40, 6950), (50, 5560), (80, 3475), (100, 2780), (125, 2224), (139, 2000), (200, 1390), (250, 1112), (278, 1000), (400, 695), (500, 556)]