199999600

素因数分解:

$2^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{127}}^2$

素因数の和:303

約数の個数: 90

約数和(自身を含む): 499935264

約数和(自身を除く): 299935664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 62, 80, 100, 124, 127, 155, 200, 248, 254, 310, 400, 496, 508, 620, 635, 775, 1016, 1240, 1270, 1550, 2032, 2480, 2540, 3100, 3175, 3937, 5080, 6200, 6350, 7874, 10160, 12400, 12700, 15748, 16129, 19685, 25400, 31496, 32258, 39370, 50800, 62992, 64516, 78740, 80645, 98425, 129032, 157480, 161290, 196850, 258064, 314960, 322580, 393700, 403225, 499999, 645160, 787400, 806450, 999998, 1290320, 1574800, 1612900, 1999996, 2499995, 3225800, 3999992, 4999990, 6451600, 7999984, 9999980, 12499975, 19999960, 24999950, 39999920, 49999900, 99999800, 199999600]

約数ペア:

[(1, 199999600), (2, 99999800), (4, 49999900), (5, 39999920), (8, 24999950), (10, 19999960), (16, 12499975), (20, 9999980), (25, 7999984), (31, 6451600), (40, 4999990), (50, 3999992), (62, 3225800), (80, 2499995), (100, 1999996), (124, 1612900), (127, 1574800), (155, 1290320), (200, 999998), (248, 806450), (254, 787400), (310, 645160), (400, 499999), (496, 403225), (508, 393700), (620, 322580), (635, 314960), (775, 258064), (1016, 196850), (1240, 161290), (1270, 157480), (1550, 129032), (2032, 98425), (2480, 80645), (2540, 78740), (3100, 64516), (3175, 62992), (3937, 50800), (5080, 39370), (6200, 32258), (6350, 31496), (7874, 25400), (10160, 19685), (12400, 16129), (12700, 15748)]