21896810

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{433}}^1$

素因数の和:842

約数の個数: 32

約数和(自身を含む): 42653520

約数和(自身を除く): 20756710

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 389, 433, 778, 866, 1945, 2165, 3890, 4330, 5057, 5629, 10114, 11258, 25285, 28145, 50570, 56290, 168437, 336874, 842185, 1684370, 2189681, 4379362, 10948405, 21896810]

約数ペア:

[(1, 21896810), (2, 10948405), (5, 4379362), (10, 2189681), (13, 1684370), (26, 842185), (65, 336874), (130, 168437), (389, 56290), (433, 50570), (778, 28145), (866, 25285), (1945, 11258), (2165, 10114), (3890, 5629), (4330, 5057)]