1291206220

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{639211}}^1$

素因数の和:639321

約数の個数: 24

約数和(自身を含む): 2738384208

約数和(自身を除く): 1447177988

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 639211, 1278422, 2556844, 3196055, 6392110, 12784220, 64560311, 129120622, 258241244, 322801555, 645603110, 1291206220]

約数ペア:

[(1, 1291206220), (2, 645603110), (4, 322801555), (5, 258241244), (10, 129120622), (20, 64560311), (101, 12784220), (202, 6392110), (404, 3196055), (505, 2556844), (1010, 1278422), (2020, 639211)]