21187120

素因数分解:

$2^4\times 5^1\times {\mathrm{264839}}^1$

素因数の和:264852

約数の個数: 20

約数和(自身を含む): 49260240

約数和(自身を除く): 28073120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264839, 529678, 1059356, 1324195, 2118712, 2648390, 4237424, 5296780, 10593560, 21187120]

約数ペア:

[(1, 21187120), (2, 10593560), (4, 5296780), (5, 4237424), (8, 2648390), (10, 2118712), (16, 1324195), (20, 1059356), (40, 529678), (80, 264839)]