19905440

素因数分解:

$2^5\times 5^1\times {\mathrm{47}}^1\times {\mathrm{2647}}^1$

素因数の和:2709

約数の個数: 48

約数和(自身を含む): 48045312

約数和(自身を除く): 28139872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 47, 80, 94, 160, 188, 235, 376, 470, 752, 940, 1504, 1880, 2647, 3760, 5294, 7520, 10588, 13235, 21176, 26470, 42352, 52940, 84704, 105880, 124409, 211760, 248818, 423520, 497636, 622045, 995272, 1244090, 1990544, 2488180, 3981088, 4976360, 9952720, 19905440]

約数ペア:

[(1, 19905440), (2, 9952720), (4, 4976360), (5, 3981088), (8, 2488180), (10, 1990544), (16, 1244090), (20, 995272), (32, 622045), (40, 497636), (47, 423520), (80, 248818), (94, 211760), (160, 124409), (188, 105880), (235, 84704), (376, 52940), (470, 42352), (752, 26470), (940, 21176), (1504, 13235), (1880, 10588), (2647, 7520), (3760, 5294)]