21104860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1187}}^1$

素因数の和:1330

約数の個数: 48

約数和(自身を含む): 51093504

約数和(自身を除く): 29988644

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1187, 1270, 1778, 2374, 2540, 3556, 4445, 4748, 5935, 8309, 8890, 11870, 16618, 17780, 23740, 33236, 41545, 83090, 150749, 166180, 301498, 602996, 753745, 1055243, 1507490, 2110486, 3014980, 4220972, 5276215, 10552430, 21104860]

約数ペア:

[(1, 21104860), (2, 10552430), (4, 5276215), (5, 4220972), (7, 3014980), (10, 2110486), (14, 1507490), (20, 1055243), (28, 753745), (35, 602996), (70, 301498), (127, 166180), (140, 150749), (254, 83090), (508, 41545), (635, 33236), (889, 23740), (1187, 17780), (1270, 16618), (1778, 11870), (2374, 8890), (2540, 8309), (3556, 5935), (4445, 4748)]