21198880

素因数分解:

$2^5\times 5^1\times {\mathrm{47}}^1\times {\mathrm{2819}}^1$

素因数の和:2881

約数の個数: 48

約数和(自身を含む): 51166080

約数和(自身を除く): 29967200

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, 2819, 3760, 5638, 7520, 11276, 14095, 22552, 28190, 45104, 56380, 90208, 112760, 132493, 225520, 264986, 451040, 529972, 662465, 1059944, 1324930, 2119888, 2649860, 4239776, 5299720, 10599440, 21198880]

約数ペア:

[(1, 21198880), (2, 10599440), (4, 5299720), (5, 4239776), (8, 2649860), (10, 2119888), (16, 1324930), (20, 1059944), (32, 662465), (40, 529972), (47, 451040), (80, 264986), (94, 225520), (160, 132493), (188, 112760), (235, 90208), (376, 56380), (470, 45104), (752, 28190), (940, 22552), (1504, 14095), (1880, 11276), (2819, 7520), (3760, 5638)]