81802460

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{6361}}^1$

素因数の和:7013

約数の個数: 24

約数和(自身を含む): 172079376

約数和(自身を除く): 90276916

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 2572, 3215, 6361, 6430, 12722, 12860, 25444, 31805, 63610, 127220, 4090123, 8180246, 16360492, 20450615, 40901230, 81802460]

約数ペア:

[(1, 81802460), (2, 40901230), (4, 20450615), (5, 16360492), (10, 8180246), (20, 4090123), (643, 127220), (1286, 63610), (2572, 31805), (3215, 25444), (6361, 12860), (6430, 12722)]