20111960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1063}}^1$

素因数の和:1128

約数の個数: 64

約数和(自身を含む): 50561280

約数和(自身を除く): 30449320

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, 1063, 1720, 1892, 2126, 2365, 3784, 4252, 4730, 5315, 8504, 9460, 10630, 11693, 18920, 21260, 23386, 42520, 45709, 46772, 58465, 91418, 93544, 116930, 182836, 228545, 233860, 365672, 457090, 467720, 502799, 914180, 1005598, 1828360, 2011196, 2513995, 4022392, 5027990, 10055980, 20111960]

約数ペア:

[(1, 20111960), (2, 10055980), (4, 5027990), (5, 4022392), (8, 2513995), (10, 2011196), (11, 1828360), (20, 1005598), (22, 914180), (40, 502799), (43, 467720), (44, 457090), (55, 365672), (86, 233860), (88, 228545), (110, 182836), (172, 116930), (215, 93544), (220, 91418), (344, 58465), (430, 46772), (440, 45709), (473, 42520), (860, 23386), (946, 21260), (1063, 18920), (1720, 11693), (1892, 10630), (2126, 9460), (2365, 8504), (3784, 5315), (4252, 4730)]