20990556

素因数分解:

$2^2\times 3^3\times {\mathrm{263}}^1\times {\mathrm{739}}^1$

素因数の和:1015

約数の個数: 48

約数和(自身を含む): 54700800

約数和(自身を除く): 33710244

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108, 263, 526, 739, 789, 1052, 1478, 1578, 2217, 2367, 2956, 3156, 4434, 4734, 6651, 7101, 8868, 9468, 13302, 14202, 19953, 26604, 28404, 39906, 79812, 194357, 388714, 583071, 777428, 1166142, 1749213, 2332284, 3498426, 5247639, 6996852, 10495278, 20990556]

約数ペア:

[(1, 20990556), (2, 10495278), (3, 6996852), (4, 5247639), (6, 3498426), (9, 2332284), (12, 1749213), (18, 1166142), (27, 777428), (36, 583071), (54, 388714), (108, 194357), (263, 79812), (526, 39906), (739, 28404), (789, 26604), (1052, 19953), (1478, 14202), (1578, 13302), (2217, 9468), (2367, 8868), (2956, 7101), (3156, 6651), (4434, 4734)]