19884920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1051}}^1$

素因数の和:1116

約数の個数: 64

約数和(自身を含む): 49991040

約数和(自身を除く): 30106120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 1051, 1720, 1892, 2102, 2365, 3784, 4204, 4730, 5255, 8408, 9460, 10510, 11561, 18920, 21020, 23122, 42040, 45193, 46244, 57805, 90386, 92488, 115610, 180772, 225965, 231220, 361544, 451930, 462440, 497123, 903860, 994246, 1807720, 1988492, 2485615, 3976984, 4971230, 9942460, 19884920]

約数ペア:

[(1, 19884920), (2, 9942460), (4, 4971230), (5, 3976984), (8, 2485615), (10, 1988492), (11, 1807720), (20, 994246), (22, 903860), (40, 497123), (43, 462440), (44, 451930), (55, 361544), (86, 231220), (88, 225965), (110, 180772), (172, 115610), (215, 92488), (220, 90386), (344, 57805), (430, 46244), (440, 45193), (473, 42040), (860, 23122), (946, 21020), (1051, 18920), (1720, 11561), (1892, 10510), (2102, 9460), (2365, 8408), (3784, 5255), (4204, 4730)]