20988440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47701}}^1$

素因数の和:47723

約数の個数: 32

約数和(自身を含む): 51518160

約数和(自身を除く): 30529720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47701, 95402, 190804, 238505, 381608, 477010, 524711, 954020, 1049422, 1908040, 2098844, 2623555, 4197688, 5247110, 10494220, 20988440]

約数ペア:

[(1, 20988440), (2, 10494220), (4, 5247110), (5, 4197688), (8, 2623555), (10, 2098844), (11, 1908040), (20, 1049422), (22, 954020), (40, 524711), (44, 477010), (55, 381608), (88, 238505), (110, 190804), (220, 95402), (440, 47701)]