20749240

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4759}}^1$

素因数の和:4879

約数の個数: 32

約数和(自身を含む): 47124000

約数和(自身を除く): 26374760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4759, 9518, 19036, 23795, 38072, 47590, 95180, 190360, 518731, 1037462, 2074924, 2593655, 4149848, 5187310, 10374620, 20749240]

約数ペア:

[(1, 20749240), (2, 10374620), (4, 5187310), (5, 4149848), (8, 2593655), (10, 2074924), (20, 1037462), (40, 518731), (109, 190360), (218, 95180), (436, 47590), (545, 38072), (872, 23795), (1090, 19036), (2180, 9518), (4360, 4759)]