19855840

素因数分解:

$2^5\times 5^1\times {\mathrm{193}}^1\times {\mathrm{643}}^1$

素因数の和:851

約数の個数: 48

約数和(自身を含む): 47225808

約数和(自身を除く): 27369968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 193, 386, 643, 772, 965, 1286, 1544, 1930, 2572, 3088, 3215, 3860, 5144, 6176, 6430, 7720, 10288, 12860, 15440, 20576, 25720, 30880, 51440, 102880, 124099, 248198, 496396, 620495, 992792, 1240990, 1985584, 2481980, 3971168, 4963960, 9927920, 19855840]

約数ペア:

[(1, 19855840), (2, 9927920), (4, 4963960), (5, 3971168), (8, 2481980), (10, 1985584), (16, 1240990), (20, 992792), (32, 620495), (40, 496396), (80, 248198), (160, 124099), (193, 102880), (386, 51440), (643, 30880), (772, 25720), (965, 20576), (1286, 15440), (1544, 12860), (1930, 10288), (2572, 7720), (3088, 6430), (3215, 6176), (3860, 5144)]