20545580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{1987}}^1$

素因数の和:2054

約数の個数: 48

約数和(自身を含む): 48093696

約数和(自身を除く): 27548116

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 47, 55, 94, 110, 188, 220, 235, 470, 517, 940, 1034, 1987, 2068, 2585, 3974, 5170, 7948, 9935, 10340, 19870, 21857, 39740, 43714, 87428, 93389, 109285, 186778, 218570, 373556, 437140, 466945, 933890, 1027279, 1867780, 2054558, 4109116, 5136395, 10272790, 20545580]

約数ペア:

[(1, 20545580), (2, 10272790), (4, 5136395), (5, 4109116), (10, 2054558), (11, 1867780), (20, 1027279), (22, 933890), (44, 466945), (47, 437140), (55, 373556), (94, 218570), (110, 186778), (188, 109285), (220, 93389), (235, 87428), (470, 43714), (517, 39740), (940, 21857), (1034, 19870), (1987, 10340), (2068, 9935), (2585, 7948), (3974, 5170)]