18991000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{2713}}^1$

素因数の和:2741

約数の個数: 64

約数和(自身を含む): 50806080

約数和(自身を除く): 31815080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 125, 140, 175, 200, 250, 280, 350, 500, 700, 875, 1000, 1400, 1750, 2713, 3500, 5426, 7000, 10852, 13565, 18991, 21704, 27130, 37982, 54260, 67825, 75964, 94955, 108520, 135650, 151928, 189910, 271300, 339125, 379820, 474775, 542600, 678250, 759640, 949550, 1356500, 1899100, 2373875, 2713000, 3798200, 4747750, 9495500, 18991000]

約数ペア:

[(1, 18991000), (2, 9495500), (4, 4747750), (5, 3798200), (7, 2713000), (8, 2373875), (10, 1899100), (14, 1356500), (20, 949550), (25, 759640), (28, 678250), (35, 542600), (40, 474775), (50, 379820), (56, 339125), (70, 271300), (100, 189910), (125, 151928), (140, 135650), (175, 108520), (200, 94955), (250, 75964), (280, 67825), (350, 54260), (500, 37982), (700, 27130), (875, 21704), (1000, 18991), (1400, 13565), (1750, 10852), (2713, 7000), (3500, 5426)]