18801680

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1193}}^1$

素因数の和:1403

約数の個数: 40

約数和(自身を含む): 43972632

約数和(自身を除く): 25170952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1193, 1576, 1970, 2386, 3152, 3940, 4772, 5965, 7880, 9544, 11930, 15760, 19088, 23860, 47720, 95440, 235021, 470042, 940084, 1175105, 1880168, 2350210, 3760336, 4700420, 9400840, 18801680]

約数ペア:

[(1, 18801680), (2, 9400840), (4, 4700420), (5, 3760336), (8, 2350210), (10, 1880168), (16, 1175105), (20, 940084), (40, 470042), (80, 235021), (197, 95440), (394, 47720), (788, 23860), (985, 19088), (1193, 15760), (1576, 11930), (1970, 9544), (2386, 7880), (3152, 5965), (3940, 4772)]