19690540

素因数分解:

$2^2\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1973}}^1$

素因数の和:2481

約数の個数: 24

約数和(自身を含む): 41454000

約数和(自身を除く): 21763460

約数列:

[1, 2, 4, 5, 10, 20, 499, 998, 1973, 1996, 2495, 3946, 4990, 7892, 9865, 9980, 19730, 39460, 984527, 1969054, 3938108, 4922635, 9845270, 19690540]

約数ペア:

[(1, 19690540), (2, 9845270), (4, 4922635), (5, 3938108), (10, 1969054), (20, 984527), (499, 39460), (998, 19730), (1973, 9980), (1996, 9865), (2495, 7892), (3946, 4990)]