641350000

素因数分解:

$2^4\times 5^5\times {\mathrm{101}}^1\times {\mathrm{127}}^1$

素因数の和:261

約数の個数: 120

約数和(自身を含む): 1580898816

約数和(自身を除く): 939548816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 125, 127, 200, 202, 250, 254, 400, 404, 500, 505, 508, 625, 635, 808, 1000, 1010, 1016, 1250, 1270, 1616, 2000, 2020, 2032, 2500, 2525, 2540, 3125, 3175, 4040, 5000, 5050, 5080, 6250, 6350, 8080, 10000, 10100, 10160, 12500, 12625, 12700, 12827, 15875, 20200, 25000, 25250, 25400, 25654, 31750, 40400, 50000, 50500, 50800, 51308, 63125, 63500, 64135, 79375, 101000, 102616, 126250, 127000, 128270, 158750, 202000, 205232, 252500, 254000, 256540, 315625, 317500, 320675, 396875, 505000, 513080, 631250, 635000, 641350, 793750, 1010000, 1026160, 1262500, 1270000, 1282700, 1587500, 1603375, 2525000, 2565400, 3175000, 3206750, 5050000, 5130800, 6350000, 6413500, 8016875, 12827000, 16033750, 25654000, 32067500, 40084375, 64135000, 80168750, 128270000, 160337500, 320675000, 641350000]

約数ペア:

[(1, 641350000), (2, 320675000), (4, 160337500), (5, 128270000), (8, 80168750), (10, 64135000), (16, 40084375), (20, 32067500), (25, 25654000), (40, 16033750), (50, 12827000), (80, 8016875), (100, 6413500), (101, 6350000), (125, 5130800), (127, 5050000), (200, 3206750), (202, 3175000), (250, 2565400), (254, 2525000), (400, 1603375), (404, 1587500), (500, 1282700), (505, 1270000), (508, 1262500), (625, 1026160), (635, 1010000), (808, 793750), (1000, 641350), (1010, 635000), (1016, 631250), (1250, 513080), (1270, 505000), (1616, 396875), (2000, 320675), (2020, 317500), (2032, 315625), (2500, 256540), (2525, 254000), (2540, 252500), (3125, 205232), (3175, 202000), (4040, 158750), (5000, 128270), (5050, 127000), (5080, 126250), (6250, 102616), (6350, 101000), (8080, 79375), (10000, 64135), (10100, 63500), (10160, 63125), (12500, 51308), (12625, 50800), (12700, 50500), (12827, 50000), (15875, 40400), (20200, 31750), (25000, 25654), (25250, 25400)]