20772440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{929}}^1$

素因数の和:996

約数の個数: 64

約数和(自身を含む): 51559200

約数和(自身を除く): 30786760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 860, 929, 1118, 1720, 1858, 2236, 2795, 3716, 4472, 4645, 5590, 7432, 9290, 11180, 12077, 18580, 22360, 24154, 37160, 39947, 48308, 60385, 79894, 96616, 120770, 159788, 199735, 241540, 319576, 399470, 483080, 519311, 798940, 1038622, 1597880, 2077244, 2596555, 4154488, 5193110, 10386220, 20772440]

約数ペア:

[(1, 20772440), (2, 10386220), (4, 5193110), (5, 4154488), (8, 2596555), (10, 2077244), (13, 1597880), (20, 1038622), (26, 798940), (40, 519311), (43, 483080), (52, 399470), (65, 319576), (86, 241540), (104, 199735), (130, 159788), (172, 120770), (215, 96616), (260, 79894), (344, 60385), (430, 48308), (520, 39947), (559, 37160), (860, 24154), (929, 22360), (1118, 18580), (1720, 12077), (1858, 11180), (2236, 9290), (2795, 7432), (3716, 5590), (4472, 4645)]