20691280

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5503}}^1$

素因数の和:5563

約数の個数: 40

約数和(自身を含む): 49139712

約数和(自身を除く): 28448432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 5503, 11006, 22012, 27515, 44024, 55030, 88048, 110060, 220120, 258641, 440240, 517282, 1034564, 1293205, 2069128, 2586410, 4138256, 5172820, 10345640, 20691280]

約数ペア:

[(1, 20691280), (2, 10345640), (4, 5172820), (5, 4138256), (8, 2586410), (10, 2069128), (16, 1293205), (20, 1034564), (40, 517282), (47, 440240), (80, 258641), (94, 220120), (188, 110060), (235, 88048), (376, 55030), (470, 44024), (752, 27515), (940, 22012), (1880, 11006), (3760, 5503)]