20287580

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{3947}}^1$

素因数の和:4213

約数の個数: 24

約数和(自身を含む): 42780528

約数和(自身を除く): 22492948

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 3947, 5140, 7894, 15788, 19735, 39470, 78940, 1014379, 2028758, 4057516, 5071895, 10143790, 20287580]

約数ペア:

[(1, 20287580), (2, 10143790), (4, 5071895), (5, 4057516), (10, 2028758), (20, 1014379), (257, 78940), (514, 39470), (1028, 19735), (1285, 15788), (2570, 7894), (3947, 5140)]