20001000

素因数分解:

$2^3\times 3^1\times 5^3\times {\mathrm{59}}^1\times {\mathrm{113}}^1$

素因数の和:196

約数の個数: 128

約数和(自身を含む): 64022400

約数和(自身を除く): 44021400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 25, 30, 40, 50, 59, 60, 75, 100, 113, 118, 120, 125, 150, 177, 200, 226, 236, 250, 295, 300, 339, 354, 375, 452, 472, 500, 565, 590, 600, 678, 708, 750, 885, 904, 1000, 1130, 1180, 1356, 1416, 1475, 1500, 1695, 1770, 2260, 2360, 2712, 2825, 2950, 3000, 3390, 3540, 4425, 4520, 5650, 5900, 6667, 6780, 7080, 7375, 8475, 8850, 11300, 11800, 13334, 13560, 14125, 14750, 16950, 17700, 20001, 22125, 22600, 26668, 28250, 29500, 33335, 33900, 35400, 40002, 42375, 44250, 53336, 56500, 59000, 66670, 67800, 80004, 84750, 88500, 100005, 113000, 133340, 160008, 166675, 169500, 177000, 200010, 266680, 333350, 339000, 400020, 500025, 666700, 800040, 833375, 1000050, 1333400, 1666750, 2000100, 2500125, 3333500, 4000200, 5000250, 6667000, 10000500, 20001000]

約数ペア:

[(1, 20001000), (2, 10000500), (3, 6667000), (4, 5000250), (5, 4000200), (6, 3333500), (8, 2500125), (10, 2000100), (12, 1666750), (15, 1333400), (20, 1000050), (24, 833375), (25, 800040), (30, 666700), (40, 500025), (50, 400020), (59, 339000), (60, 333350), (75, 266680), (100, 200010), (113, 177000), (118, 169500), (120, 166675), (125, 160008), (150, 133340), (177, 113000), (200, 100005), (226, 88500), (236, 84750), (250, 80004), (295, 67800), (300, 66670), (339, 59000), (354, 56500), (375, 53336), (452, 44250), (472, 42375), (500, 40002), (565, 35400), (590, 33900), (600, 33335), (678, 29500), (708, 28250), (750, 26668), (885, 22600), (904, 22125), (1000, 20001), (1130, 17700), (1180, 16950), (1356, 14750), (1416, 14125), (1475, 13560), (1500, 13334), (1695, 11800), (1770, 11300), (2260, 8850), (2360, 8475), (2712, 7375), (2825, 7080), (2950, 6780), (3000, 6667), (3390, 5900), (3540, 5650), (4425, 4520)]