161290000

素因数分解:

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

素因数の和:282

約数の個数: 75

約数和(自身を含む): 393598227

約数和(自身を除く): 232308227

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 127, 200, 250, 254, 400, 500, 508, 625, 635, 1000, 1016, 1250, 1270, 2000, 2032, 2500, 2540, 3175, 5000, 5080, 6350, 10000, 10160, 12700, 15875, 16129, 25400, 31750, 32258, 50800, 63500, 64516, 79375, 80645, 127000, 129032, 158750, 161290, 254000, 258064, 317500, 322580, 403225, 635000, 645160, 806450, 1270000, 1290320, 1612900, 2016125, 3225800, 4032250, 6451600, 8064500, 10080625, 16129000, 20161250, 32258000, 40322500, 80645000, 161290000]

約数ペア:

[(1, 161290000), (2, 80645000), (4, 40322500), (5, 32258000), (8, 20161250), (10, 16129000), (16, 10080625), (20, 8064500), (25, 6451600), (40, 4032250), (50, 3225800), (80, 2016125), (100, 1612900), (125, 1290320), (127, 1270000), (200, 806450), (250, 645160), (254, 635000), (400, 403225), (500, 322580), (508, 317500), (625, 258064), (635, 254000), (1000, 161290), (1016, 158750), (1250, 129032), (1270, 127000), (2000, 80645), (2032, 79375), (2500, 64516), (2540, 63500), (3175, 50800), (5000, 32258), (5080, 31750), (6350, 25400), (10000, 16129), (10160, 15875)]