217780990

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{63493}}^1$

素因数の和:63521

約数の個数: 32

約数和(自身を含む): 457156800

約数和(自身を除く): 239375810

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 343, 490, 686, 1715, 3430, 63493, 126986, 317465, 444451, 634930, 888902, 2222255, 3111157, 4444510, 6222314, 15555785, 21778099, 31111570, 43556198, 108890495, 217780990]

約数ペア:

[(1, 217780990), (2, 108890495), (5, 43556198), (7, 31111570), (10, 21778099), (14, 15555785), (35, 6222314), (49, 4444510), (70, 3111157), (98, 2222255), (245, 888902), (343, 634930), (490, 444451), (686, 317465), (1715, 126986), (3430, 63493)]