20161866820

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{479}}^1\times {\mathrm{4999}}^1$

素因数の和:5908

約数の個数: 48

約数和(自身を含む): 42537600000

約数和(自身を除く): 22375733180

約数列:

[1, 2, 4, 5, 10, 20, 421, 479, 842, 958, 1684, 1916, 2105, 2395, 4210, 4790, 4999, 8420, 9580, 9998, 19996, 24995, 49990, 99980, 201659, 403318, 806636, 1008295, 2016590, 2104579, 2394521, 4033180, 4209158, 4789042, 8418316, 9578084, 10522895, 11972605, 21045790, 23945210, 42091580, 47890420, 1008093341, 2016186682, 4032373364, 5040466705, 10080933410, 20161866820]

約数ペア:

[(1, 20161866820), (2, 10080933410), (4, 5040466705), (5, 4032373364), (10, 2016186682), (20, 1008093341), (421, 47890420), (479, 42091580), (842, 23945210), (958, 21045790), (1684, 11972605), (1916, 10522895), (2105, 9578084), (2395, 8418316), (4210, 4789042), (4790, 4209158), (4999, 4033180), (8420, 2394521), (9580, 2104579), (9998, 2016590), (19996, 1008295), (24995, 806636), (49990, 403318), (99980, 201659)]