643500500

素因数分解:

$2^2\times 5^3\times {\mathrm{47}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:402

約数の個数: 96

約数和(自身を含む): 1452971520

約数和(自身を除く): 809471020

約数列:

[1, 2, 4, 5, 10, 20, 25, 47, 50, 94, 100, 125, 139, 188, 197, 235, 250, 278, 394, 470, 500, 556, 695, 788, 940, 985, 1175, 1390, 1970, 2350, 2780, 3475, 3940, 4700, 4925, 5875, 6533, 6950, 9259, 9850, 11750, 13066, 13900, 17375, 18518, 19700, 23500, 24625, 26132, 27383, 32665, 34750, 37036, 46295, 49250, 54766, 65330, 69500, 92590, 98500, 109532, 130660, 136915, 163325, 185180, 231475, 273830, 326650, 462950, 547660, 653300, 684575, 816625, 925900, 1157375, 1287001, 1369150, 1633250, 2314750, 2574002, 2738300, 3266500, 3422875, 4629500, 5148004, 6435005, 6845750, 12870010, 13691500, 25740020, 32175025, 64350050, 128700100, 160875125, 321750250, 643500500]

約数ペア:

[(1, 643500500), (2, 321750250), (4, 160875125), (5, 128700100), (10, 64350050), (20, 32175025), (25, 25740020), (47, 13691500), (50, 12870010), (94, 6845750), (100, 6435005), (125, 5148004), (139, 4629500), (188, 3422875), (197, 3266500), (235, 2738300), (250, 2574002), (278, 2314750), (394, 1633250), (470, 1369150), (500, 1287001), (556, 1157375), (695, 925900), (788, 816625), (940, 684575), (985, 653300), (1175, 547660), (1390, 462950), (1970, 326650), (2350, 273830), (2780, 231475), (3475, 185180), (3940, 163325), (4700, 136915), (4925, 130660), (5875, 109532), (6533, 98500), (6950, 92590), (9259, 69500), (9850, 65330), (11750, 54766), (13066, 49250), (13900, 46295), (17375, 37036), (18518, 34750), (19700, 32665), (23500, 27383), (24625, 26132)]