20108440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1987}}^1$

素因数の和:2032

約数の個数: 64

約数和(自身を含む): 51528960

約数和(自身を除く): 31420520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 44, 46, 55, 88, 92, 110, 115, 184, 220, 230, 253, 440, 460, 506, 920, 1012, 1265, 1987, 2024, 2530, 3974, 5060, 7948, 9935, 10120, 15896, 19870, 21857, 39740, 43714, 45701, 79480, 87428, 91402, 109285, 174856, 182804, 218570, 228505, 365608, 437140, 457010, 502711, 874280, 914020, 1005422, 1828040, 2010844, 2513555, 4021688, 5027110, 10054220, 20108440]

約数ペア:

[(1, 20108440), (2, 10054220), (4, 5027110), (5, 4021688), (8, 2513555), (10, 2010844), (11, 1828040), (20, 1005422), (22, 914020), (23, 874280), (40, 502711), (44, 457010), (46, 437140), (55, 365608), (88, 228505), (92, 218570), (110, 182804), (115, 174856), (184, 109285), (220, 91402), (230, 87428), (253, 79480), (440, 45701), (460, 43714), (506, 39740), (920, 21857), (1012, 19870), (1265, 15896), (1987, 10120), (2024, 9935), (2530, 7948), (3974, 5060)]