18991760

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5051}}^1$

素因数の和:5111

約数の個数: 40

約数和(自身を含む): 45104256

約数和(自身を除く): 26112496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 5051, 10102, 20204, 25255, 40408, 50510, 80816, 101020, 202040, 237397, 404080, 474794, 949588, 1186985, 1899176, 2373970, 3798352, 4747940, 9495880, 18991760]

約数ペア:

[(1, 18991760), (2, 9495880), (4, 4747940), (5, 3798352), (8, 2373970), (10, 1899176), (16, 1186985), (20, 949588), (40, 474794), (47, 404080), (80, 237397), (94, 202040), (188, 101020), (235, 80816), (376, 50510), (470, 40408), (752, 25255), (940, 20204), (1880, 10102), (3760, 5051)]