21509247

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1\times {\mathrm{1811}}^1$

素因数の和:1958

約数の個数: 16

約数和(自身を含む): 29745792

約数和(自身を除く): 8236545

約数列:

[1, 3, 37, 107, 111, 321, 1811, 3959, 5433, 11877, 67007, 193777, 201021, 581331, 7169749, 21509247]

約数ペア:

[(1, 21509247), (3, 7169749), (37, 581331), (107, 201021), (111, 193777), (321, 67007), (1811, 11877), (3959, 5433)]