28900000

素因数分解:

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

素因数の和:69

約数の個数: 108

約数和(自身を含む): 75545946

約数和(自身を除く): 46645946

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 32, 34, 40, 50, 68, 80, 85, 100, 125, 136, 160, 170, 200, 250, 272, 289, 340, 400, 425, 500, 544, 578, 625, 680, 800, 850, 1000, 1156, 1250, 1360, 1445, 1700, 2000, 2125, 2312, 2500, 2720, 2890, 3125, 3400, 4000, 4250, 4624, 5000, 5780, 6250, 6800, 7225, 8500, 9248, 10000, 10625, 11560, 12500, 13600, 14450, 17000, 20000, 21250, 23120, 25000, 28900, 34000, 36125, 42500, 46240, 50000, 53125, 57800, 68000, 72250, 85000, 100000, 106250, 115600, 144500, 170000, 180625, 212500, 231200, 289000, 340000, 361250, 425000, 578000, 722500, 850000, 903125, 1156000, 1445000, 1700000, 1806250, 2890000, 3612500, 5780000, 7225000, 14450000, 28900000]

約数ペア:

[(1, 28900000), (2, 14450000), (4, 7225000), (5, 5780000), (8, 3612500), (10, 2890000), (16, 1806250), (17, 1700000), (20, 1445000), (25, 1156000), (32, 903125), (34, 850000), (40, 722500), (50, 578000), (68, 425000), (80, 361250), (85, 340000), (100, 289000), (125, 231200), (136, 212500), (160, 180625), (170, 170000), (200, 144500), (250, 115600), (272, 106250), (289, 100000), (340, 85000), (400, 72250), (425, 68000), (500, 57800), (544, 53125), (578, 50000), (625, 46240), (680, 42500), (800, 36125), (850, 34000), (1000, 28900), (1156, 25000), (1250, 23120), (1360, 21250), (1445, 20000), (1700, 17000), (2000, 14450), (2125, 13600), (2312, 12500), (2500, 11560), (2720, 10625), (2890, 10000), (3125, 9248), (3400, 8500), (4000, 7225), (4250, 6800), (4624, 6250), (5000, 5780)]