21475580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{727}}^1$

素因数の和:954

約数の個数: 48

約数和(自身を含む): 51856896

約数和(自身を除く): 30381316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 727, 844, 1055, 1454, 1477, 2110, 2908, 2954, 3635, 4220, 5089, 5908, 7270, 7385, 10178, 14540, 14770, 20356, 25445, 29540, 50890, 101780, 153397, 306794, 613588, 766985, 1073779, 1533970, 2147558, 3067940, 4295116, 5368895, 10737790, 21475580]

約数ペア:

[(1, 21475580), (2, 10737790), (4, 5368895), (5, 4295116), (7, 3067940), (10, 2147558), (14, 1533970), (20, 1073779), (28, 766985), (35, 613588), (70, 306794), (140, 153397), (211, 101780), (422, 50890), (727, 29540), (844, 25445), (1055, 20356), (1454, 14770), (1477, 14540), (2110, 10178), (2908, 7385), (2954, 7270), (3635, 5908), (4220, 5089)]