289000

素因数分解:

$2^3\times 5^3\times {\mathrm{17}}^2$

素因数の和:55

約数の個数: 48

約数和(自身を含む): 718380

約数和(自身を除く): 429380

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 25, 34, 40, 50, 68, 85, 100, 125, 136, 170, 200, 250, 289, 340, 425, 500, 578, 680, 850, 1000, 1156, 1445, 1700, 2125, 2312, 2890, 3400, 4250, 5780, 7225, 8500, 11560, 14450, 17000, 28900, 36125, 57800, 72250, 144500, 289000]

約数ペア:

[(1, 289000), (2, 144500), (4, 72250), (5, 57800), (8, 36125), (10, 28900), (17, 17000), (20, 14450), (25, 11560), (34, 8500), (40, 7225), (50, 5780), (68, 4250), (85, 3400), (100, 2890), (125, 2312), (136, 2125), (170, 1700), (200, 1445), (250, 1156), (289, 1000), (340, 850), (425, 680), (500, 578)]