19781788

素因数分解:

$2^2\times {\mathrm{13}}^3\times {\mathrm{2251}}^1$

素因数の和:2294

約数の個数: 24

約数和(自身を含む): 37518320

約数和(自身を除く): 17736532

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 2197, 2251, 4394, 4502, 8788, 9004, 29263, 58526, 117052, 380419, 760838, 1521676, 4945447, 9890894, 19781788]

約数ペア:

[(1, 19781788), (2, 9890894), (4, 4945447), (13, 1521676), (26, 760838), (52, 380419), (169, 117052), (338, 58526), (676, 29263), (2197, 9004), (2251, 8788), (4394, 4502)]