20797480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4297}}^1$

素因数の和:4330

約数の個数: 48

約数和(自身を含む): 51447060

約数和(自身を除く): 30649580

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4297, 4840, 8594, 17188, 21485, 34376, 42970, 47267, 85940, 94534, 171880, 189068, 236335, 378136, 472670, 519937, 945340, 1039874, 1890680, 2079748, 2599685, 4159496, 5199370, 10398740, 20797480]

約数ペア:

[(1, 20797480), (2, 10398740), (4, 5199370), (5, 4159496), (8, 2599685), (10, 2079748), (11, 1890680), (20, 1039874), (22, 945340), (40, 519937), (44, 472670), (55, 378136), (88, 236335), (110, 189068), (121, 171880), (220, 94534), (242, 85940), (440, 47267), (484, 42970), (605, 34376), (968, 21485), (1210, 17188), (2420, 8594), (4297, 4840)]