21617268820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{499}}^1\times {\mathrm{309437}}^1$

素因数の和:309952

約数の個数: 48

約数和(自身を含む): 51985584000

約数和(自身を除く): 30368315180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 499, 998, 1996, 2495, 3493, 4990, 6986, 9980, 13972, 17465, 34930, 69860, 309437, 618874, 1237748, 1547185, 2166059, 3094370, 4332118, 6188740, 8664236, 10830295, 21660590, 43321180, 154409063, 308818126, 617636252, 772045315, 1080863441, 1544090630, 2161726882, 3088181260, 4323453764, 5404317205, 10808634410, 21617268820]

約数ペア:

[(1, 21617268820), (2, 10808634410), (4, 5404317205), (5, 4323453764), (7, 3088181260), (10, 2161726882), (14, 1544090630), (20, 1080863441), (28, 772045315), (35, 617636252), (70, 308818126), (140, 154409063), (499, 43321180), (998, 21660590), (1996, 10830295), (2495, 8664236), (3493, 6188740), (4990, 4332118), (6986, 3094370), (9980, 2166059), (13972, 1547185), (17465, 1237748), (34930, 618874), (69860, 309437)]