20996888

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 43890000

約数和(自身を除く): 22893112

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 109, 121, 199, 218, 242, 398, 436, 484, 796, 872, 968, 1199, 1592, 2189, 2398, 4378, 4796, 8756, 9592, 13189, 17512, 21691, 24079, 26378, 43382, 48158, 52756, 86764, 96316, 105512, 173528, 192632, 238601, 477202, 954404, 1908808, 2624611, 5249222, 10498444, 20996888]

約数ペア:

[(1, 20996888), (2, 10498444), (4, 5249222), (8, 2624611), (11, 1908808), (22, 954404), (44, 477202), (88, 238601), (109, 192632), (121, 173528), (199, 105512), (218, 96316), (242, 86764), (398, 52756), (436, 48158), (484, 43382), (796, 26378), (872, 24079), (968, 21691), (1199, 17512), (1592, 13189), (2189, 9592), (2398, 8756), (4378, 4796)]