81938180

素因数分解:

$2^2\times 5^1\times {\mathrm{337}}^1\times {\mathrm{12157}}^1$

素因数の和:12503

約数の個数: 24

約数和(自身を含む): 172594968

約数和(自身を除く): 90656788

約数列:

[1, 2, 4, 5, 10, 20, 337, 674, 1348, 1685, 3370, 6740, 12157, 24314, 48628, 60785, 121570, 243140, 4096909, 8193818, 16387636, 20484545, 40969090, 81938180]

約数ペア:

[(1, 81938180), (2, 40969090), (4, 20484545), (5, 16387636), (10, 8193818), (20, 4096909), (337, 243140), (674, 121570), (1348, 60785), (1685, 48628), (3370, 24314), (6740, 12157)]